Year	Percent
1950	11.12785
1955	11.94369
1960	12.71103
1965	12.63794
1970	12.74988
1975	14.01995
1980	15.33675
1985	14.10772
1990	13.67571
1995	14.82678
2000	14.9363
2005	15.13798
2010	16.06549
2015	17.62266
2020	17.80735
2025	17.93363
2030	16.91096
2035	16.77722
2040	17.37077
2045	18.77831
2050	21.09613
2055	21.82966
2060	21.7126
2065	21.23036
2070	20.94667
2075	21.45745
2080	22.49494
2085	23.19572
2090	23.20678
2095	22.76865
2100	22.40376