Year	Percent
1950	31.38516
1955	29.67534
1960	27.29865
1965	24.05246
1970	22.04917
1975	21.72317
1980	26.27011
1985	28.79779
1990	30.9062
1995	32.28416
2000	31.66769
2005	30.55989
2010	30.85535
2015	32.12709
2020	32.05558
2025	30.21708
2030	27.87861
2035	24.9844
2040	23.44567
2045	22.89524
2050	22.35567
2055	21.99263
2060	20.34684
2065	19.00577
2070	18.21599
2075	17.9459
2080	17.92621
2085	17.76962
2090	17.34979
2095	16.79216
2100	16.36227