Year	Percent
1950	16.78449
1955	19.40036
1960	18.61382
1965	17.85922
1970	17.09015
1975	16.41876
1980	16.02114
1985	15.47085
1990	15.04715
1995	14.19178
2000	13.5449
2005	12.98299
2010	11.5309
2015	11.02828
2020	10.51491
2025	9.95603
2030	9.41399
2035	8.91264
2040	8.43866
2045	8.01268
2050	7.62869
2055	7.26346
2060	6.90827
2065	6.59614
2070	6.32016
2075	6.08177
2080	5.87116
2085	5.68398
2090	5.51966
2095	5.3737
2100	5.24527