African-American % by state, by decade

[ElectionsGuy]

There's a good wikipedia article on this showing all the data of historical ethnic and racial populations here. I know this is thread is just for 1910 and 1970, but I kind of want to start from the beginning for fun. Here is 1790 (using the same key your using):

I do find it very interesting that in 1910, literally all the states defined as southern by the census bureau have a black population of over 5%, while all the states not defined as southern have a black population under 5%.

[ElectionsGuy]

1800:

1810:

Not sure what the huge drop in Alabama is all about.

1820:

1830:

1840:

1850:

Kind of weird that Washington is over 10% black here, drops massively to less than 1% in next census.

1860:

1870:

1880:

1890:

1900:

1910 (See OP)

1920:

1930:

1940:

1950:

1960:

[ElectionsGuy]

1970:

1980:

1990:

2000:

2010:

[ElectionsGuy]

How is West Virginia a different color than Virginia?

The Wikipedia page that I got the data off of separates Virginia and West Virginia automatically, I don't know what it would be put together from 1790-1860.

Same thing with Maine-Massachusetts.