Year	Percent
1950	14.67477
1955	14.73858
1960	14.69444
1965	14.47755
1970	14.04295
1975	13.47401
1980	12.99833
1985	12.63552
1990	12.43071
1995	12.33465
2000	12.38413
2005	12.55253
2010	12.91222
2015	13.64921
2020	14.64867
2025	15.63478
2030	16.44226
2035	16.87803
2040	17.25763
2045	17.99911
2050	19.00374
2055	20.05693
2060	20.94215
2065	21.51988
2070	21.96585
2075	22.4715
2080	23.03543
2085	23.57751
2090	24.02084
2095	24.3821
2100	24.68264