Year	Percent
1950	10.36793
1955	10.30861
1960	9.84635
1965	9.84251
1970	10.61207
1975	10.73519
1980	10.72981
1985	10.5915
1990	10.88153
1995	10.6433
2000	10.09589
2005	10.44763
2010	11.45841
2015	11.36503
2020	9.7085
2025	8.94808
2030	8.55631
2035	8.42737
2040	8.04184
2045	7.47965
2050	6.89398
2055	6.40923
2060	6.08175
2065	5.86557
2070	5.66364
2075	5.44547
2080	5.23038
2085	5.07497
2090	4.98189
2095	4.93986
2100	4.90962