Year	Percent
1950	29.10018
1955	28.27733
1960	27.4703
1965	26.60829
1970	25.87896
1975	26.19156
1980	26.22206
1985	26.01808
1990	25.72048
1995	25.15612
2000	24.97904
2005	25.17422
2010	25.85194
2015	26.78462
2020	27.82523
2025	28.90102
2030	29.88446
2035	30.69611
2040	31.31888
2045	31.7554
2050	32.02502
2055	32.11523
2060	32.03556
2065	31.80335
2070	31.45116
2075	31.02935
2080	30.5761
2085	30.11889
2090	29.65937
2095	29.18519
2100	28.68998