Year	Percent
1950	14.36015
1955	14.63668
1960	14.42413
1965	14.01426
1970	13.56792
1975	13.22097
1980	12.87093
1985	12.6411
1990	11.85498
1995	10.86674
2000	10.84474
2005	12.27173
2010	12.95601
2015	14.38387
2020	16.96167
2025	20.80162
2030	24.87292
2035	26.99336
2040	26.37718
2045	25.24339
2050	23.94335
2055	24.53716
2060	26.00726
2065	26.83844
2070	26.60551
2075	25.11672
2080	23.56886
2085	22.75598
2090	22.7061
2095	22.89918
2100	22.83604