Welcome to Health Reform Watch, Sarah Kliff’s regular look at how the Affordable Care Act is changing the American health-care system — and being changed by it. You can reach Sarah with questions, comments and suggestions here. Check back every Monday, Wednesday and Friday afternoon for the latest edition, and read previous columns here.

Get excited health-care world: I think I've found my new favorite Government Accountability Office report, perhaps the most scintillating of their works since "Status of CMS Efforts to Establish Federally Facilitated Health Insurance Exchanges," which was, admittedly, also a page-turner.

The report came at the request of Sen. Orrin Hatch, a Republican who represents Utah. He wanted to know how much health insurance costs right this moment, which could help us better understand how the marketplace will change with the Affordable Care Act.

On Monday, the Government Accountability Office sent back a thick stack of insurance data, broken down by state, explaining the cost of health insurance. Analysts there used data from HealthCare.Gov, a new site created under the Affordable Care Act where insurers post their offerings and how much they cost.

The database, the GAO analysts admit, isn't perfect. About 20 percent of insurers don't post their plan data, which means we're missing about one-fifth of the marketplace. There's no enrollment data, which means some of the options listed may not have any subscribers.

Still, this is probably the best data set we have on insurance premiums so far. It's also a dense report, 62 pages of line-by-line data that I've found a bit easier to digest in a chart.

What you see below are premiums from 10 states and the District of Columbia for a 30-year-old female who does not smoke and has not yet been underwritten (read: She could face a higher charge, if she has a preexisting condition).

I chose these states because these are the ones that Health and Human Services used in its report last week, which looked at premiums under the Affordable Care Act. As for the demographic element, the GAO only broke out data for certain types of insurance subscribers. I picked out one, but you can see the rest in the full report.

Without further ado, here's what premiums look like right now for a young woman purchasing her own health insurance coverage:

A few things stood out to me here.

Some young, healthy adults can buy really cheap insurance right now. In most states, a 30-year-old without preexisting conditions can purchase a health insurance plan for about $55. New York's premiums are a notable exception to this for reasons explained here. Washington and Rhode Island I'm less familiar with and not quite sure why their premiums are so much higher than the rest.

But not all of them: One in five applicants on HealthCare.Gov are rejected. The data you see before is all before underwriting, where insurers figure out the amount they should actually charge a subscriber –– or if they even want to insure that person in the first place. A separate GAO study found that 19 percent of applicants for coverage on HealthCare.Gov are rejected by the insurance company. With some plans, the number is as high as 70 percent.

That coverage will be really skimpy. The majority of those plans in the $50-range have a deductible of $10,000. Vermont's $55 offering has an impressively large $100,000 deductible (no, that last zero is not a typo). This is something that will be very different under the Affordable Care Act, where cost sharing for an individual (not just the deductible, but all the co-pays too) is limited to about $6,000. There's a debate over whether this is a good thing; some argue that this forces young adults to buy coverage more robust than what they need. But what both sides do agree on is that plans sold on the new marketplaces will be more robust than what's on the market right now.

Some young adults will still get insurance for $55 under Obamacare. Some won't. It all depends on their income level, which determines the level of subsidies that an individual receives. California, for example, estimates that a young adult at 150 percent of the federal poverty line would be able to purchase a health plan for $44 per month:

A 21-year-old who received no subsidy at all, by contrast, would face a $172 premium for the same insurance plan.

It's still hard to compare premiums pre- Obamacare and afterward. You'll notice that the numbers in my chart are significantly lower than those in HHS's estimates of average premiums under Obamacare. I would caution against reading too much into that.

Part of the difference is undoubtedly due to the Affordable Care Act: Premiums increase when sick people enter the market, and policies are required to cover more benefits. But another part of it is a less sexy issue of data formatting that makes the HHS and GAO data a bit of an apples-to-oranges situation. The HHS data are capturing both Obamacare policies and the cost of insuring older adults, and any comparisons to the GAO figures should probably be made with a massive grain of salt.

KLIFF NOTES: Top health policy reads from around the Web. 

Hospitals are gearing up for a big Obamacare push. "Big chains, publicly owned safety-net facilities and local hospitals are ramping up their efforts to be ready for the six-month open enrollment period for 2014 health insurance that begins Oct. 1, when the health insurance exchanges for people who don't get health benefits at work are due to open for business. How well they do could go a long way to determining the success of Obamacare's first year." Jeff Young in the Huffington Post.

Congratulations Wisconsin and Virignia, you're the lowest Obamacare spenders! "Only one state will spend less per capita than Virginia to promote public awareness of the new health care reform law. According to data compiled by The Associated Press from federal and state sources, the $3.9 million in outreach spending in Virginia amounts to 49 cents per resident. Only Wisconsin, at 46 cents, is spending less per capita." The Associated Press.

Of course Oregon's fight over Obamacare is being fought with...acoustic guitars. "Ben Nanke, a 20-year-old aspiring songwriter and filmmaker from Salem, admires the musicality of the "Cover Oregon" ads promoting the state's new health care exchange. But Nanke, a registered Republican and self-described libertarian, doesn't think much of Obamacare, or any government-run health care for that matter. So with some friends, he created his own music video championing the virtues of rugged individualism." Jeff Mapes in the Oregonian.