Year	Percent
1950	13.37027
1955	12.80225
1960	13.04992
1965	12.86317
1970	12.70396
1975	12.64041
1980	11.9449
1985	11.59994
1990	12.7958
1995	12.85972
2000	13.13094
2005	13.63785
2010	15.10512
2015	17.57272
2020	19.22487
2025	21.33282
2030	23.19014
2035	25.65382
2040	27.77903
2045	29.13324
2050	29.26364
2055	28.854
2060	28.74848
2065	29.31568
2070	30.50478
2075	31.68955
2080	32.52795
2085	33.04386
2090	33.45964
2095	33.97036
2100	34.59793