The gender breakdown of the next Congress is still to be determined, but a major milestone was reached Tuesday night: For the first time in American history, the number of women sitting in Congress will hit triple digits. Democrat Alma Adams of North Carolina won a special election for representative of the 12th Congressional District. Because it was a special election, she will be seated shortly and will not have to wait for January’s swearing-in ceremony, making her the 100th woman currently sitting in Congress, as the graph below shows.

(The source for this graph is a fact sheet from Rutgers’ Center for American Women and Politics, which notes that this data shows the “maximum number of women elected or appointed to serve in that Congress at one time. Some filled out unexpired terms and some were never sworn in.”)