Year	Percent
1950	9.32658
1955	10.42944
1960	10.55123
1965	10.18932
1970	10.79601
1975	9.94301
1980	10.73322
1985	10.47929
1990	9.89855
1995	8.13465
2000	6.87499
2005	6.67308
2010	7.0529
2015	7.82039
2020	7.48362
2025	6.6411
2030	5.90608
2035	5.64436
2040	5.80108
2045	6.05514
2050	6.10759
2055	5.90526
2060	5.6093
2065	5.42151
2070	5.41622
2075	5.50004
2080	5.55082
2085	5.48432
2090	5.32977
2095	5.18651
2100	5.12265