Year	Percent
1950	12.40636
1955	12.44628
1960	12.5608
1965	12.80479
1970	13.10502
1975	13.41872
1980	13.64198
1985	13.73564
1990	13.73811
1995	13.36193
2000	12.79182
2005	11.99995
2010	11.32298
2015	11.36362
2020	12.49006
2025	14.67799
2030	16.83984
2035	17.98996
2040	18.45978
2045	19.14317
2050	20.27546
2055	21.61945
2060	22.7385
2065	23.14136
2070	23.17664
2075	23.44039
2080	23.89031
2085	24.34808
2090	24.63106
2095	24.6826
2100	24.60513