Year	Percent
1950	11.58089
1955	11.1287
1960	10.59568
1965	13.64419
1970	13.04228
1975	13.13189
1980	13.73828
1985	13.66268
1990	12.96364
1995	14.01688
2000	13.2037
2005	13.17752
2010	13.07231
2015	11.93014
2020	10.55821
2025	9.86792
2030	9.90377
2035	9.93181
2040	9.67436
2045	8.9746
2050	8.09561
2055	7.47486
2060	7.26756
2065	7.26662
2070	7.18145
2075	6.87551
2080	6.43223
2085	6.06992
2090	5.92862
2095	5.94702
2100	5.95775