Year	Percent
1950	9.47526
1955	9.47446
1960	9.82013
1965	9.91776
1970	9.6563
1975	10.99764
1980	12.42679
1985	11.8654
1990	10.77541
1995	9.50804
2000	10.33457
2005	10.62402
2010	9.80763
2015	9.0059
2020	7.41213
2025	6.12247
2030	5.90549
2035	5.72392
2040	5.48608
2045	5.23812
2050	4.9523
2055	4.68657
2060	4.54999
2065	4.53263
2070	4.56032
2075	4.56379
2080	4.54078
2085	4.51935
2090	4.533
2095	4.58402
2100	4.64637