Year	Percent
1950	13.42257
1955	13.18744
1960	13.05339
1965	12.87792
1970	12.58921
1975	12.28189
1980	12.01158
1985	11.8479
1990	11.88536
1995	12.33927
2000	12.56443
2005	12.87055
2010	13.50305
2015	13.88848
2020	14.32015
2025	14.7784
2030	15.20868
2035	16.1002
2040	17.28443
2045	18.56023
2050	19.75195
2055	20.54736
2060	21.07107
2065	21.49423
2070	21.97572
2075	22.53085
2080	23.06213
2085	23.48829
2090	23.78971
2095	24.0228
2100	24.25306