The Obama administration will announce its tenth Obamacare delay later today, this time extending the March 31 enrollment deadline for people who say they’ve been unable to enroll in health plans in the federal marketplace by the deadline. The extension applies to the federal exchange operating in three dozen states and is expected to last for two or three weeks.

Can’t remember what all the delays have been? Politico provided a helpful history of Obamacare delays from most to least recent:

March 25: Final enrollment deadline extended. The March 31 deadline — the end of enrollment for 2014 — will be loosened for people with special sign-up circumstances.

March 14: High risk pools extended. The special, temporary coverage for people with serious pre-existing conditions — which was only supposed to last until the health insurance exchanges were in place — was extended a third time for another month.

Feb. 10: Employer mandate delayed. This time, businesses with between 50 and 100 workers were given until 2016 to offer coverage, and the mandate will be phased in for employers with more than 100 workers.

Jan. 14: High risk pools extended. The high-risk insurance pools, which originally had been slated to close Jan. 1, had already been extended once.

Dec. 24: Enrollment deadline extended. In a message on HealthCare.gov, customers were told they could get help finishing their Jan. 1 applications if they were already in line on Dec. 24.

Dec 12: Enrollment deadline extended. Customers on the federal enrollment website were given nearly two more weeks to sign up for coverage effective Jan. 1.

Nov. 27: SHOP delayed. Online enrollment for the federal health insurance exchanges for small businesses was delayed.

Nov. 21: Open enrollment delayed for 2015. The administration pushed back next year’s enrollment season by a month.

July 2: Employer mandate delayed. The administration declared that it wouldn’t enforce the fines in 2014 for businesses with more than 50 full-time workers who don’t offer health coverage. The fines were pushed back to 2015.

Nov. 15, 2012: Exchange deadline delayed. The Department of Health and Human Services gave states an extra month to decide whether they would set up their own health insurance exchanges — a decision they announced just one day before the original deadline.