Year	Percent
1950	9.98609
1955	8.85177
1960	10.06111
1965	12.7924
1970	12.91092
1975	12.64757
1980	12.31014
1985	11.67855
1990	11.62698
1995	10.71313
2000	9.94473
2005	9.98003
2010	9.02287
2015	8.42766
2020	6.91605
2025	6.51167
2030	6.04329
2035	6.32249
2040	6.25449
2045	5.60805
2050	4.92052
2055	4.59768
2060	4.67561
2065	4.91015
2070	5.02159
2075	4.8737
2080	4.62097
2085	4.47289
2090	4.52281
2095	4.67424
2100	4.77518