Year	Percent
1950	5.66293
1955	5.65766
1960	5.6589
1965	8.48088
1970	11.04603
1975	10.675
1980	10.51486
1985	11.01157
1990	10.94758
1995	13.1474
2000	11.00244
2005	11.97192
2010	10.64233
2015	10.80309
2020	11.51303
2025	11.43416
2030	11.02869
2035	10.46461
2040	10.14903
2045	9.97158
2050	9.76844
2055	9.51263
2060	9.25415
2065	8.98321
2070	8.72587
2075	8.47882
2080	8.27131
2085	8.08561
2090	7.90382
2095	7.70535
2100	7.51947