Comment: It only includes the states that are in the federal exchange

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In reply to comment: No data on washington state (see in situ)

It only includes the states that are in the federal exchange

Sates that made their own exchanges, such as Washington, aren't included. It's also just public data, the same data you can get via the front page of the federal site without giving any personal info. The link given in the OP is also found on the federal site. It's just another way the public data is made available, intentionally. See my post below for links.