Year	Percent
1950	7.50768
1955	8.8729
1960	7.02812
1965	6.24327
1970	6.76591
1975	7.48622
1980	8.45325
1985	7.98781
1990	5.67203
1995	5.26712
2000	5.61331
2005	5.76977
2010	5.17218
2015	5.02021
2020	4.61862
2025	4.38342
2030	4.4831
2035	4.67196
2040	4.77754
2045	4.70085
2050	4.55721
2055	4.47574
2060	4.50518
2065	4.62878
2070	4.75032
2075	4.79614
2080	4.76147
2085	4.69683
2090	4.65133
2095	4.66053
2100	4.69015