Year	Percent
1950	11.11049
1955	10.47718
1960	11.66814
1965	12.33813
1970	14.32573
1975	15.04247
1980	13.72529
1985	11.50665
1990	9.51122
1995	10.15919
2000	9.98223
2005	9.96584
2010	9.37493
2015	8.65255
2020	8.23962
2025	8.00924
2030	7.64204
2035	7.30753
2040	6.99014
2045	6.66099
2050	6.37769
2055	6.15568
2060	5.96683
2065	5.80309
2070	5.6432
2075	5.49946
2080	5.37943
2085	5.278
2090	5.2071
2095	5.1435
2100	5.08983