Year	Percent
1950	11.58734
1955	11.78654
1960	11.64929
1965	11.37729
1970	11.63269
1975	11.74289
1980	11.62789
1985	12.10296
1990	12.5652
1995	12.65525
2000	12.29749
2005	11.98245
2010	12.04559
2015	12.36403
2020	12.51206
2025	12.53061
2030	12.19618
2035	11.85654
2040	11.57941
2045	11.31696
2050	11.02134
2055	10.67014
2060	10.28892
2065	9.91386
2070	9.53057
2075	9.19555
2080	8.88738
2085	8.57064
2090	8.25649
2095	7.95362
2100	7.68391