Year	Percent
1950	15.55749
1955	14.74669
1960	13.92443
1965	13.32364
1970	12.947
1975	12.70733
1980	12.83662
1985	13.23706
1990	13.58714
1995	14.75993
2000	16.02215
2005	17.3096
2010	18.75942
2015	19.76049
2020	20.64769
2025	21.5573
2030	22.51146
2035	23.34905
2040	24.06401
2045	24.43041
2050	24.6678
2055	24.87603
2060	25.01186
2065	25.16862
2070	25.10182
2075	24.88677
2080	24.626
2085	24.3533
2090	24.07623
2095	23.78531
2100	23.49564