Year	Percent
1950	10.24941
1955	9.31227
1960	10.47836
1965	12.83095
1970	10.71139
1975	11.87068
1980	13.05623
1985	11.52758
1990	8.47684
1995	8.45801
2000	10.34293
2005	7.92946
2010	6.16086
2015	5.87034
2020	6.03176
2025	6.19332
2030	5.80125
2035	5.27002
2040	4.92959
2045	4.79428
2050	4.81713
2055	4.88855
2060	4.88005
2065	4.77268
2070	4.64952
2075	4.6188
2080	4.67005
2085	4.75405
2090	4.79839
2095	4.7842
2100	4.74374