One in 5 Americans now has access to fully legal marijuana

2016 was a huge year for legal marijuana.

Four states — California, Massachusetts, Nevada, and Maine — all voted to fully legalize marijuana use, cultivation, distribution, and sales in the November 8 election. When the changes to the various state laws take effect, the number of states with fully legal cannabis will increase to eight (plus Washington, DC).

Though that's still a fraction of the US, California has an outsized impact — it's the most populous state in the union, with nearly 40 million residents. As a result, 21% of US citizens now live somewhere with access to fully legal marijuana.

More starkly: One in five people in the US now lives somewhere with legal weed.

Eight states (and D.C.) have fully legalized marijuana: Colorado, Washington, Oregon, Alaska, California, Massachusetts, Maine, and Nevada. Between those eight states and D.C., that's just over 68 million Americans.

By far, the most impactful state to have full legalization is California. With Proposition 64 — the ballot initiative to legalize marijuana — voters overwhelmingly chose yes on November 8.

56% of voters said yes to the initiative.

As of 12:01 a.m. on November 9, marijuana use is fully legal in California. There's a $100 fine for smoking in public, and driving under the influence of marijuana remains illegal. California residents are allowed to grow up to six plants in their homes, and recreational sales from shops will become legal on January 1, 2018. The legislation is similar in the other three states that voted in favor of legalization last week.

The immediate implications for California's economy are huge.

California's looking at $1.5 billion flooding into the marijuana market. That number swells to just shy of $3 billion in 2019, and nearly $4 billion by 2020, based on the latest report from New Frontier Data and ArcView Market Research.

The US' most populous state is already pulling in billions annually from medical marijuana, which was legalized in California by Proposition 215 back in 1996. The total size of the cannabis market would reach $4.27 billion in 2018, and would grow to $6.45 billion by 2020 (according to ArcView's projections).

Another question altogether is what impact will the presidential election have on the ongoing push toward nationwide marijuana legalization. The long and short: no one knows for sure, but Bloomberg has an interesting look into how the legal marijuana industry is reacting.

SEE ALSO: 4 states just voted to make marijuana completely legal — here's what we know

DON'T MISS: What Colorado and other states tell us about how marijuana's big election day will affect health

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NOW WATCH: This animated map shows where marijuana is legal in the US

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