Year	Percent
1950	11.62008
1955	11.28799
1960	11.5061
1965	12.0909
1970	12.25447
1975	12.63577
1980	12.58809
1985	12.16529
1990	12.07071
1995	11.33691
2000	11.15096
2005	10.50042
2010	9.56104
2015	9.0154
2020	8.64579
2025	8.45787
2030	7.96058
2035	7.44889
2040	6.98413
2045	6.60426
2050	6.30968
2055	6.06884
2060	5.83243
2065	5.59825
2070	5.39551
2075	5.23714
2080	5.1192
2085	5.02743
2090	4.94929
2095	4.87515
2100	4.80746