With more and more states legalizing marijuana, it can be difficult to remember who actually instituted which laws at what time. Did Alaska legalize cannabis before or after Washington and Oregon? Colorado was the first state to legalize recreational use, but who were the first to do so medicinally?

Luckily someone at SAS Learning Post put together three charts and maps that show a comprehensive and clear timeline for America's marijuana legalization timeline.

First, we have a timeline of when states enacted medical and recreational marijuana laws.

01 marijuana legalization timeline

Next we have a timeline showing the same thing, but also showing how many states in every year had some form of legalized marijuana. This one shows which states were pioneers versus followers, particularly when it comes to medical marijuana.

02 marijuana legalization timeline

And finally we have a GIF showing all the states and their marijuana legalization status over the years.

03 marijuana legalization timeline

Who knows, maybe in a few years we'll be looking at an all green map!

(h/t SAS Learning Post)