Year	Percent
1950	15.22555
1955	15.54888
1960	15.62359
1965	15.96114
1970	14.65548
1975	12.77136
1980	12.38353
1985	13.09373
1990	13.12
1995	11.9215
2000	11.87836
2005	9.92313
2010	9.44299
2015	9.86663
2020	9.39892
2025	8.7048
2030	8.16195
2035	7.83028
2040	7.59257
2045	7.31598
2050	7.0184
2055	6.72262
2060	6.44223
2065	6.19864
2070	5.9981
2075	5.84421
2080	5.70426
2085	5.55548
2090	5.42213
2095	5.29969
2100	5.20418