Year	Percent
1950	9.64096
1955	9.58547
1960	9.46529
1965	9.21766
1970	10.5142
1975	10.36003
1980	10.02524
1985	9.67258
1990	9.72478
1995	10.01778
2000	10.30695
2005	10.53671
2010	10.66017
2015	10.68096
2020	10.7182
2025	10.7142
2030	10.56285
2035	10.38859
2040	10.18687
2045	9.9624
2050	9.69739
2055	9.40761
2060	9.12154
2065	8.8332
2070	8.54261
2075	8.2708
2080	8.00408
2085	7.7512
2090	7.50304
2095	7.27132
2100	7.03766