Year	Percent
1950	29.01595
1955	28.30754
1960	27.61983
1965	26.91438
1970	26.23173
1975	26.31533
1980	26.14313
1985	25.82663
1990	25.50898
1995	25.10361
2000	25.04958
2005	25.30915
2010	25.98824
2015	26.87698
2020	27.87344
2025	28.92169
2030	29.895
2035	30.71624
2040	31.36191
2045	31.82569
2050	32.11888
2055	32.22591
2060	32.15669
2065	31.93141
2070	31.59397
2075	31.19704
2080	30.77635
2085	30.35931
2090	29.95133
2095	29.53763
2100	29.1137