Year	Percent
1950	27.46566
1955	26.65066
1960	26.34818
1965	24.55018
1970	20.76329
1975	20.56691
1980	19.48426
1985	25.00659
1990	26.6834
1995	27.56349
2000	27.71037
2005	29.17586
2010	31.7749
2015	34.37221
2020	35.80624
2025	35.28264
2030	33.66248
2035	31.78279
2040	30.37639
2045	29.37272
2050	28.38645
2055	27.3585
2060	26.13704
2065	24.97657
2070	24.05737
2075	23.38636
2080	22.87988
2085	22.4493
2090	22.0456
2095	21.68824
2100	21.40765