Year	Percent
1950	15.87667
1955	16.97951
1960	17.70138
1965	18.12132
1970	17.33422
1975	15.96346
1980	13.17213
1985	12.83485
1990	12.87608
1995	13.83139
2000	13.3689
2005	13.10503
2010	12.88482
2015	12.89454
2020	13.61714
2025	14.97762
2030	16.4498
2035	17.58288
2040	18.29331
2045	18.69935
2050	19.35062
2055	20.2777
2060	21.31545
2065	22.20976
2070	22.75376
2075	23.08235
2080	23.42443
2085	23.82253
2090	24.23247
2095	24.5414
2100	24.71712