Year	Percent
1950	7.65939
1955	7.98526
1960	10.26786
1965	10.43659
1970	11.17672
1975	11.63225
1980	11.08739
1985	10.96959
1990	10.8046
1995	9.60917
2000	10.19336
2005	10.93531
2010	10.28435
2015	10.38256
2020	10.2414
2025	9.57142
2030	8.92155
2035	8.5745
2040	8.43648
2045	8.31195
2050	8.11438
2055	7.82409
2060	7.50236
2065	7.22097
2070	7.01183
2075	6.84582
2080	6.6623
2085	6.44833
2090	6.22575
2095	6.03255
2100	5.86318