Year	Percent
1950	11.53096
1955	11.48388
1960	11.53752
1965	13.49419
1970	14.32853
1975	15.07021
1980	14.12119
1985	16.99903
1990	14.88207
1995	15.05012
2000	14.1889
2005	14.23899
2010	14.84067
2015	14.37854
2020	13.76783
2025	12.9401
2030	12.37291
2035	11.95458
2040	11.51317
2045	11.02159
2050	10.54467
2055	10.06989
2060	9.63175
2065	9.22052
2070	8.85755
2075	8.52082
2080	8.1986
2085	7.87577
2090	7.58318
2095	7.29713
2100	7.03859