Year	Percent
1950	10.87076
1955	10.95128
1960	11.0291
1965	11.00418
1970	11.5347
1975	12.54127
1980	11.89451
1985	10.33232
1990	9.93599
1995	10.52402
2000	10.80169
2005	9.32357
2010	9.3943
2015	8.44302
2020	8.33169
2025	8.84084
2030	8.55571
2035	7.98158
2040	7.53702
2045	7.28881
2050	7.12677
2055	6.92321
2060	6.68571
2065	6.44306
2070	6.20868
2075	6.00465
2080	5.83856
2085	5.71631
2090	5.60782
2095	5.49213
2100	5.39045