Year	Percent
1950	11.1955
1955	11.13475
1960	11.08791
1965	11.37779
1970	11.63603
1975	11.91499
1980	12.20619
1985	12.54318
1990	12.75015
1995	12.37361
2000	11.80844
2005	11.43594
2010	11.39017
2015	11.85494
2020	12.45362
2025	12.34903
2030	11.5377
2035	11.12247
2040	10.99069
2045	10.90532
2050	10.65377
2055	10.25052
2060	9.85673
2065	9.54132
2070	9.27276
2075	9.01869
2080	8.7208
2085	8.40741
2090	8.11603
2095	7.84911
2100	7.61847