Year	Percent
1950	10.70952
1955	9.79263
1960	10.36702
1965	9.78735
1970	10.68715
1975	9.9568
1980	10.03414
1985	10.04365
1990	11.71892
1995	11.76289
2000	10.9706
2005	10.62059
2010	10.48212
2015	10.97902
2020	10.98816
2025	11.06708
2030	10.56893
2035	9.84869
2040	9.4033
2045	9.16116
2050	8.97122
2055	8.73246
2060	8.41608
2065	8.05068
2070	7.73119
2075	7.45629
2080	7.23304
2085	7.00494
2090	6.76753
2095	6.52357
2100	6.29587