Before revision: In the US, the divorce rate changed from 1.2 per 1000 marriages in 1860 to 3.0, 4.0, and 7.7 in 1890, 1900, 1920 then 1920.
After revision: In the US, the divorce rate changed from 1.2 per 1000 marriages in 1860 to 3.0, 4.0, and 7.7 in 1890, 1900, 1920.