*t2

Gender balance in US Congress since 1866

Data source: The @unitedstates Project (http://theunitedstates.io/)

Source code: https://github.com/sjmgarnier/US_congress_history

Disclaimer: I made this graph for my own pleasure and for learning new plotting methods. Do not consider it a reliable source of information. Refer directly to the data source for more information regarding the data collection method.