Year	Percent
1950	27.72802
1955	30.73714
1960	32.37169
1965	31.7063
1970	28.64143
1975	25.27608
1980	24.24948
1985	24.5343
1990	26.19691
1995	28.23896
2000	29.68801
2005	34.05202
2010	38.11115
2015	39.79784
2020	38.09567
2025	33.61121
2030	29.34471
2035	27.60128
2040	27.71458
2045	27.7908
2050	26.43679
2055	23.90397
2060	21.84544
2065	21.01831
2070	21.16927
2075	21.46639
2080	21.27952
2085	20.61089
2090	19.94753
2095	19.69684
2100	19.85653