Year	Percent
1950	12.48491
1955	12.6557
1960	12.48107
1965	13.99492
1970	14.07819
1975	15.51985
1980	14.68681
1985	13.70394
1990	12.57145
1995	12.29398
2000	11.98423
2005	12.30991
2010	11.66892
2015	11.73003
2020	12.40603
2025	11.35531
2030	10.26051
2035	9.77107
2040	9.64084
2045	9.73935
2050	9.61983
2055	9.13584
2060	8.45733
2065	7.89766
2070	7.63057
2075	7.50824
2080	7.33014
2085	6.97464
2090	6.53072
2095	6.12689
2100	5.87848