Year	Percent
1950	8.78514
1955	9.19248
1960	9.60767
1965	10.42552
1970	11.14995
1975	11.49023
1980	11.66951
1985	12.73833
1990	16.36214
1995	18.15976
2000	18.888
2005	19.08047
2010	19.90551
2015	21.98879
2020	24.5219
2025	27.73532
2030	31.19213
2035	35
2040	38.32899
2045	39.61505
2050	39.48839
2055	38.83225
2060	37.8919
2065	37.49171
2070	37.74696
2075	37.68139
2080	37.62553
2085	37.55937
2090	37.53463
2095	37.62121
2100	37.84726