Year	Percent
1950	27.43635
1955	27.18491
1960	27.03965
1965	26.65057
1970	26.65122
1975	27.18835
1980	27.49618
1985	28.8571
1990	30.23416
1995	31.2361
2000	32.03437
2005	32.43194
2010	32.93492
2015	33.0235
2020	32.26249
2025	31.44688
2030	30.40892
2035	29.64617
2040	29.07357
2045	28.4126
2050	27.58217
2055	26.51381
2060	25.54414
2065	24.74724
2070	24.09009
2075	23.50732
2080	22.95681
2085	22.43266
2090	21.97605
2095	21.61744
2100	21.34939