US Popularity Grouped by Sound


KEY  
robert [Robert, Robbert, Robertt, etc] (m)
robert [Robert] (f)
1890 1900 1910 1920 1930 1940 1950 1960 1970 1980 1990 2000 2010 5.700% 4.560% 3.420% 2.280% 1.140% 1880 2023