Year	Percent
1950	9.17456
1955	8.27284
1960	8.54698
1965	10.61867
1970	10.78657
1975	10.88766
1980	11.80668
1985	11.11406
1990	10.02418
1995	9.74336
2000	7.0924
2005	6.89154
2010	7.0849
2015	6.97128
2020	6.38755
2025	5.63704
2030	5.24415
2035	4.69825
2040	4.79104
2045	5.13493
2050	5.24564
2055	5.05702
2060	4.78499
2065	4.60437
2070	4.60839
2075	4.7537
2080	4.8429
2085	4.77246
2090	4.59182
2095	4.45211
2100	4.42098