Year	Percent
1950	10.28864
1955	9.92995
1960	12.04529
1965	12.98667
1970	15.14409
1975	14.62005
1980	14.49736
1985	13.53418
1990	13.2056
1995	13.98549
2000	11.4836
2005	9.05257
2010	7.96368
2015	9.16357
2020	10.86399
2025	9.61383
2030	8.38524
2035	7.49818
2040	7.06904
2045	7.03998
2050	7.16899
2055	7.19495
2060	6.88454
2065	6.40127
2070	6.06075
2075	5.9462
2080	5.97126
2085	5.99542
2090	5.90477
2095	5.71169
2100	5.50082