Year	Percent
1950	15.34449
1955	16.99464
1960	16.6803
1965	16.45885
1970	16.32792
1975	16.28433
1980	16.30801
1985	15.84713
1990	15.06655
1995	14.37395
2000	13.71434
2005	12.77042
2010	11.78638
2015	10.84859
2020	10.2919
2025	9.72496
2030	9.14976
2035	8.57687
2040	8.04706
2045	7.569
2050	7.15214
2055	6.7788
2060	6.44607
2065	6.14436
2070	5.88184
2075	5.65399
2080	5.46656
2085	5.30663
2090	5.16816
2095	5.05016
2100	4.94482