Year	Percent
1950	12.70092
1955	11.72857
1960	15.45339
1965	13.52697
1970	14.23125
1975	15.99792
1980	15.57782
1985	15.61532
1990	15.41711
1995	14.9555
2000	14.37231
2005	14.3385
2010	13.88114
2015	13.70443
2020	13.63758
2025	13.08444
2030	12.53775
2035	12.09288
2040	11.71128
2045	11.35531
2050	10.99579
2055	10.61037
2060	10.22833
2065	9.84316
2070	9.51485
2075	9.17366
2080	8.84259
2085	8.50183
2090	8.17124
2095	7.8457
2100	7.52853