Year	Percent
1950	11.90575
1955	11.43298
1960	11.43271
1965	13.23535
1970	13.13408
1975	12.94986
1980	13.09162
1985	12.10407
1990	8.95586
1995	13.70569
2000	14.30339
2005	13.53031
2010	11.14942
2015	9.57074
2020	9.80909
2025	9.75757
2030	9.36073
2035	8.59709
2040	7.96889
2045	7.62175
2050	7.39896
2055	7.11083
2060	6.73535
2065	6.38295
2070	6.12364
2075	5.94767
2080	5.81219
2085	5.65932
2090	5.49773
2095	5.35473
2100	5.24614