Year	Percent
1950	14.87618
1955	15.37094
1960	15.55892
1965	15.33128
1970	14.64981
1975	13.71931
1980	12.77394
1985	11.99678
1990	11.37818
1995	11.00264
2000	10.88444
2005	10.9534
2010	11.25174
2015	11.65206
2020	12.26887
2025	12.98539
2030	13.62827
2035	14.33114
2040	15.08777
2045	16.01567
2050	17.18846
2055	18.33738
2060	19.3695
2065	20.2546
2070	21.00679
2075	21.73381
2080	22.43031
2085	23.04159
2090	23.53116
2095	23.9194
2100	24.22149