Year	Percent
1950	11.74215
1955	12.29964
1960	12.61877
1965	12.55093
1970	12.41791
1975	12.2538
1980	11.47232
1985	11.79528
1990	12.09999
1995	12.0327
2000	12.86926
2005	14.27497
2010	15.53112
2015	17.01818
2020	18.69711
2025	19.89758
2030	22.27323
2035	24.24028
2040	25.577
2045	26.68996
2050	26.51701
2055	26.51745
2060	26.5561
2065	26.70187
2070	27.0518
2075	27.19419
2080	27.11624
2085	26.8669
2090	26.57694
2095	26.3675
2100	26.26766