Year	Percent
1950	7.14391
1955	7.87601
1960	8.9675
1965	9.40658
1970	9.64476
1975	8.97562
1980	7.62638
1985	6.83986
1990	6.60783
1995	6.83905
2000	7.074
2005	7.03303
2010	6.51067
2015	6.26351
2020	6.13464
2025	5.66404
2030	5.73888
2035	5.80726
2040	5.76822
2045	5.67622
2050	5.58169
2055	5.51257
2060	5.49364
2065	5.5142
2070	5.50639
2075	5.4524
2080	5.38294
2085	5.32615
2090	5.302
2095	5.29007
2100	5.27443