Year	Percent
1950	30.00449
1955	28.78738
1960	26.61159
1965	25.59101
1970	26.41769
1975	28.41338
1980	31.20638
1985	33.14429
1990	32.86974
1995	31.40873
2000	29.96102
2005	28.89132
2010	29.24242
2015	28.81854
2020	28.07568
2025	26.70957
2030	26.26665
2035	24.9943
2040	24.71274
2045	24.61814
2050	23.8702
2055	23.3038
2060	22.78901
2065	22.37102
2070	22.08875
2075	21.87226
2080	21.64431
2085	21.37307
2090	21.10048
2095	20.8823
2100	20.71707