Year	Percent
1950	11.86043
1955	11.95152
1960	12.11224
1965	12.42664
1970	12.76808
1975	13.11417
1980	13.38941
1985	13.54182
1990	13.6025
1995	13.34912
2000	12.78333
2005	11.90015
2010	11.11011
2015	11.01702
2020	12.09362
2025	14.25962
2030	16.41558
2035	17.57647
2040	18.1034
2045	18.86574
2050	20.08921
2055	21.49831
2060	22.65166
2065	23.11078
2070	23.21278
2075	23.54662
2080	24.0637
2085	24.57133
2090	24.89006
2095	24.96612
2100	24.90213