Year	Percent
1950	10.79505
1955	11.33537
1960	11.68905
1965	11.835
1970	11.96559
1975	12.01242
1980	12.79706
1985	13.96786
1990	13.24325
1995	12.37372
2000	12.38519
2005	13.09607
2010	12.70868
2015	11.54433
2020	11.04496
2025	11.4852
2030	11.02635
2035	10.45371
2040	9.84697
2045	9.32965
2050	8.92683
2055	8.6005
2060	8.25931
2065	7.87649
2070	7.49745
2075	7.16816
2080	6.89335
2085	6.66683
2090	6.46774
2095	6.26566
2100	6.08225