Year	Percent
1950	10.23828
1955	11.31806
1960	12.07903
1965	12.84556
1970	13.60881
1975	14.09875
1980	10.86728
1985	10.30083
1990	10.6221
1995	12.04617
2000	10.45113
2005	8.14428
2010	6.75087
2015	6.80003
2020	7.17899
2025	7.14675
2030	6.52997
2035	5.97119
2040	5.68425
2045	5.7115
2050	5.8783
2055	5.94377
2060	5.82562
2065	5.63531
2070	5.52318
2075	5.53639
2080	5.6198
2085	5.66399
2090	5.61713
2095	5.51042
2100	5.4205