Year	Percent
1950	32.53256
1955	31.06536
1960	28.41687
1965	26.07467
1970	24.65771
1975	25.7521
1980	27.50433
1985	29.2922
1990	31.19513
1995	32.02655
2000	32.94557
2005	33.39418
2010	32.44333
2015	31.76162
2020	31.72346
2025	32.11235
2030	31.87486
2035	30.93485
2040	29.73392
2045	28.29556
2050	27.55706
2055	27.3047
2060	26.96506
2065	26.41021
2070	25.74784
2075	25.19572
2080	24.86163
2085	24.72732
2090	24.64634
2095	24.49516
2100	24.25775