Year	Percent
1950	9.3779
1955	14.16444
1960	7.54174
1965	8.46305
1970	10.4953
1975	11.80928
1980	11.15575
1985	9.49791
1990	9.25627
1995	9.35771
2000	10.10936
2005	10.82216
2010	9.53865
2015	6.74099
2020	6.39701
2025	8.76032
2030	10.36803
2035	9.15801
2040	8.06071
2045	7.3386
2050	7.20778
2055	7.43918
2060	7.64697
2065	7.53064
2070	7.08955
2075	6.59941
2080	6.32024
2085	6.25743
2090	6.27303
2095	6.22706
2100	6.07429