Year	Percent
1950	14.02079
1955	14.14018
1960	13.68671
1965	13.87807
1970	14.11428
1975	14.29606
1980	14.37202
1985	14.45356
1990	14.60426
1995	14.68386
2000	14.79291
2005	14.77542
2010	15.03998
2015	15.2914
2020	15.25196
2025	14.75893
2030	14.20111
2035	13.69359
2040	13.16104
2045	12.57224
2050	11.90773
2055	11.24092
2060	10.61757
2065	10.02744
2070	9.50671
2075	8.98519
2080	8.49474
2085	8.04674
2090	7.6228
2095	7.25052
2100	6.91881