Year	Percent
1950	15.45826
1955	15.68118
1960	15.6054
1965	15.10132
1970	14.11238
1975	12.89004
1980	11.7034
1985	10.78231
1990	10.13301
1995	9.74977
2000	9.70058
2005	9.90605
2010	10.37045
2015	10.95134
2020	11.71728
2025	12.5508
2030	13.28065
2035	14.04884
2040	14.85253
2045	15.81548
2050	17.00173
2055	18.15487
2060	19.18455
2065	20.06558
2070	20.82663
2075	21.57196
2080	22.30057
2085	22.95423
2090	23.49359
2095	23.93545
2100	24.2899