Year	Percent
1950	9.4846
1955	10.1288
1960	8.79537
1965	10.05346
1970	11.06845
1975	11.02898
1980	11.63424
1985	10.60994
1990	10.15285
1995	9.8229
2000	9.80871
2005	10.01064
2010	10.00859
2015	9.43344
2020	8.018
2025	7.18011
2030	7.05419
2035	7.10245
2040	7.00292
2045	6.60463
2050	6.07033
2055	5.64898
2060	5.46358
2065	5.46773
2070	5.49584
2075	5.43065
2080	5.27831
2085	5.11977
2090	5.03193
2095	5.03392
2100	5.07082