Year	Percent
1950	26.96748
1955	26.29605
1960	25.95601
1965	25.92587
1970	25.75162
1975	26.98388
1980	28.35398
1985	29.61469
1990	30.99836
1995	31.53824
2000	31.63614
2005	31.65112
2010	31.85416
2015	31.8314
2020	31.63778
2025	31.05856
2030	30.40032
2035	29.79246
2040	29.16795
2045	28.63108
2050	27.89067
2055	27.03904
2060	26.19831
2065	25.40644
2070	24.6784
2075	24.00365
2080	23.38471
2085	22.83279
2090	22.3481
2095	21.9387
2100	21.59949