Year	Percent
1950	12.01018
1955	12.10729
1960	13.47512
1965	13.47507
1970	13.39745
1975	13.0954
1980	12.90791
1985	12.6741
1990	12.714
1995	12.22007
2000	11.38274
2005	10.75948
2010	10.17078
2015	9.52058
2020	8.53264
2025	8.12756
2030	7.72376
2035	7.33758
2040	6.91193
2045	6.48933
2050	6.16211
2055	5.92114
2060	5.71996
2065	5.52833
2070	5.35525
2075	5.20774
2080	5.09533
2085	5.01557
2090	4.95748
2095	4.89898
2100	4.8443