Year	Percent
1950	9.87653
1955	9.95526
1960	10.10004
1965	9.96796
1970	9.52642
1975	9.3426
1980	9.50084
1985	9.79084
1990	10.39588
1995	10.79124
2000	11.02991
2005	10.76856
2010	10.66112
2015	10.90132
2020	11.13738
2025	11.24265
2030	10.7945
2035	10.44709
2040	10.10862
2045	9.77451
2050	9.41328
2055	9.05025
2060	8.68807
2065	8.3539
2070	8.057
2075	7.76368
2080	7.50682
2085	7.26594
2090	7.05246
2095	6.86386
2100	6.70594