Year	Percent
1950	7.27139
1955	6.10817
1960	7.85909
1965	9.41759
1970	9.12842
1975	7.53311
1980	6.92309
1985	6.94367
1990	8.5867
1995	9.0627
2000	7.08424
2005	6.67653
2010	6.01531
2015	4.4871
2020	4.74783
2025	5.65219
2030	5.53721
2035	5.44715
2040	5.19723
2045	4.86185
2050	4.73195
2055	4.99051
2060	5.31096
2065	5.42346
2070	5.364
2075	5.22479
2080	5.11876
2085	5.14442
2090	5.26992
2095	5.35543
2100	5.32783