Year	Percent
1950	26.03761
1955	25.43665
1960	26.88283
1965	24.4362
1970	25.2659
1975	26.31603
1980	27.93756
1985	29.91976
1990	29.39974
1995	28.6694
2000	27.21454
2005	25.95956
2010	24.71924
2015	23.33964
2020	23.02846
2025	22.77712
2030	22.75079
2035	22.79241
2040	22.58983
2045	22.25073
2050	21.94209
2055	21.85836
2060	21.91887
2065	21.96337
2070	21.87864
2075	21.64635
2080	21.36421
2085	21.14668
2090	21.00815
2095	20.90512
2100	20.78247