Year	Percent
1950	9.53892
1955	9.51821
1960	9.40405
1965	8.06865
1970	11.07732
1975	11.39496
1980	11.66453
1985	11.10672
1990	10.47879
1995	10.69225
2000	10.78828
2005	10.76917
2010	9.1718
2015	7.61033
2020	6.84924
2025	7.08575
2030	8.18789
2035	7.78673
2040	7.05839
2045	6.30277
2050	5.86405
2055	5.86562
2060	6.04793
2065	6.08551
2070	5.87163
2075	5.53824
2080	5.30323
2085	5.24915
2090	5.30372
2095	5.34258
2100	5.29214