Year	Percent
1950	12.62344
1955	12.89266
1960	14.11604
1965	14.21354
1970	14.23888
1975	14.25948
1980	14.36468
1985	14.37524
1990	14.07917
1995	13.28188
2000	12.97493
2005	13.17763
2010	12.78082
2015	12.26174
2020	11.57416
2025	11.08123
2030	10.67848
2035	10.29617
2040	9.92163
2045	9.5358
2050	9.1676
2055	8.81323
2060	8.50804
2065	8.22361
2070	7.94838
2075	7.6867
2080	7.42403
2085	7.1815
2090	6.95334
2095	6.74083
2100	6.55073