Year	Percent
1950	25.17646
1955	26.25058
1960	23.84712
1965	24.92878
1970	24.95794
1975	24.29004
1980	25.4161
1985	24.80832
1990	25.00592
1995	26.71187
2000	28.03385
2005	27.34289
2010	28.00958
2015	27.68722
2020	28.94298
2025	29.82561
2030	29.78178
2035	29.03614
2040	26.78522
2045	25.97393
2050	25.46703
2055	24.2235
2060	24.10503
2065	24.16688
2070	24.03218
2075	24.02566
2080	23.88373
2085	23.70552
2090	23.52001
2095	23.42576
2100	23.36836