Year	Percent
1950	16.95108
1955	18.3849
1960	18.48073
1965	18.61634
1970	18.63249
1975	18.88027
1980	19.09136
1985	18.97944
1990	18.02848
1995	17.24054
2000	16.47146
2005	16.11215
2010	16.28513
2015	16.12636
2020	15.07942
2025	14.14756
2030	13.43478
2035	12.90084
2040	12.41867
2045	11.89218
2050	11.3246
2055	10.74596
2060	10.21585
2065	9.76013
2070	9.35429
2075	8.95377
2080	8.56089
2085	8.17757
2090	7.79435
2095	7.45539
2100	7.13971