Year	Percent
1950	28.02144
1955	28.16819
1960	28.31671
1965	28.29684
1970	28.23892
1975	27.49166
1980	26.49021
1985	25.607
1990	25.10683
1995	25.2122
2000	25.5909
2005	26.59865
2010	27.37726
2015	28.99761
2020	31.201
2025	32.70324
2030	33.48835
2035	33.61432
2040	33.21423
2045	32.75343
2050	32.37299
2055	31.77703
2060	31.00336
2065	30.14038
2070	29.2815
2075	28.44033
2080	27.63385
2085	26.84115
2090	26.07119
2095	25.34856
2100	24.68605