Year	Percent
1950	10.72032
1955	12.23593
1960	11.873
1965	11.3146
1970	10.41473
1975	9.16776
1980	7.88992
1985	7.91403
1990	8.64959
1995	8.12886
2000	7.71495
2005	6.7539
2010	5.76151
2015	5.63177
2020	5.59667
2025	5.28858
2030	4.84697
2035	4.6284
2040	4.5507
2045	4.53842
2050	4.50009
2055	4.41535
2060	4.33258
2065	4.29056
2070	4.31718
2075	4.37445
2080	4.42105
2085	4.44337
2090	4.44731
2095	4.4459
2100	4.46521