Year	Percent
1950	15.24876
1955	13.79906
1960	12.72228
1965	12.7821
1970	14.07888
1975	15.22122
1980	15.36909
1985	14.42087
1990	13.01936
1995	14.13772
2000	16.12096
2005	18.47635
2010	20.90069
2015	22.14209
2020	23.01293
2025	24.31619
2030	25.30053
2035	25.92127
2040	25.55427
2045	24.62953
2050	24.08715
2055	24.25512
2060	24.80112
2065	25.1128
2070	25.01626
2075	24.23656
2080	23.61637
2085	23.26587
2090	23.11419
2095	22.98611
2100	22.74064