How high was unemployment during the Great Depression?

The history books record that unemployment reached as high as 25% in the USA during the Great Depression.

What is often not appreciated is that, in those days, 25% unemployment meant that 25% of HOUSEHOLDS and FAMILIES were without any means of support. Many more people felt the impact of the loss of a job in the 1930s, because a family typically only had one breadwinner in those days (and on top of that, unemployment benefits or other governmental safety nets were very rare). Today, with so many families having both heads working outside the home, one spouse can remain employed while the other is unemployed. This reduces greatly the impact of a given percentage unemployment on a particular family.

Today's estimated 17% unemployment in the USA (which includes long-term unemployed and discouraged workers, not just those receiving unemployment compensation) is at a "depression" level of unemployment, though the impact is as yet not as severe as the unemployment of the 1930s.

At least 25 percent