Year	Percent
1950	11.05242
1955	13.71408
1960	15.21251
1965	14.74149
1970	11.89496
1975	11.55938
1980	11.41362
1985	11.51705
1990	11.35522
1995	9.16946
2000	7.40345
2005	7.9804
2010	9.79474
2015	11.2175
2020	9.65392
2025	8.38572
2030	7.60831
2035	7.4592
2040	7.64709
2045	7.76666
2050	7.55254
2055	7.05164
2060	6.54553
2065	6.27154
2070	6.2078
2075	6.20218
2080	6.11073
2085	5.90305
2090	5.6478
2095	5.44199
2100	5.34608