Year	Percent
1950	10.74361
1955	13.64115
1960	13.25973
1965	13.82285
1970	13.65866
1975	13.64011
1980	13.16086
1985	13.31578
1990	13.68267
1995	13.9555
2000	12.05256
2005	10.69191
2010	10.62942
2015	10.44735
2020	11.9505
2025	10.76993
2030	9.70641
2035	9.07049
2040	8.94122
2045	8.90281
2050	8.55092
2055	8.06708
2060	7.60897
2065	7.27111
2070	7.04928
2075	6.82383
2080	6.56169
2085	6.2809
2090	6.03075
2095	5.8306
2100	5.67669