Year	Percent
1950	15.16559
1955	14.74334
1960	14.24893
1965	13.76309
1970	13.38261
1975	13.11802
1980	12.81969
1985	11.74764
1990	10.81472
1995	12.67035
2000	14.02712
2005	15.9657
2010	18.91272
2015	23.78928
2020	27.92515
2025	29.09823
2030	29.75263
2035	29.54562
2040	28.17335
2045	27.29553
2050	26.54598
2055	26.07788
2060	26.84832
2065	27.5601
2070	27.43185
2075	26.703
2080	25.52262
2085	24.72653
2090	24.5216
2095	24.6269
2100	24.66926