Year	Percent
1950	13.10651
1955	13.77535
1960	14.00657
1965	14.00263
1970	13.84634
1975	13.65287
1980	13.43004
1985	13.17288
1990	12.90934
1995	12.6898
2000	12.89886
2005	13.34325
2010	13.95168
2015	14.71872
2020	15.44479
2025	16.16918
2030	16.86725
2035	17.46604
2040	18.0139
2045	18.56149
2050	19.20411
2055	20.00996
2060	20.77675
2065	21.45305
2070	21.98467
2075	22.36531
2080	22.73709
2085	23.11488
2090	23.48755
2095	23.81949
2100	24.09186