Year	Percent
1950	15.08706
1955	14.56915
1960	14.16324
1965	13.8167
1970	13.55715
1975	13.223
1980	12.69404
1985	11.57315
1990	11.49673
1995	11.76407
2000	11.53457
2005	11.22535
2010	11.25684
2015	11.68638
2020	12.62815
2025	13.83996
2030	15.13236
2035	16.73896
2040	18.82035
2045	21.17098
2050	23.58971
2055	25.22385
2060	26.27212
2065	26.7664
2070	26.93921
2075	27.28534
2080	27.46081
2085	27.50679
2090	27.36345
2095	27.07108
2100	26.69918