Year	Percent
1950	7.92153
1955	8.76017
1960	7.84073
1965	7.22541
1970	8.36303
1975	9.17229
1980	8.84779
1985	7.16484
1990	5.99436
1995	6.34957
2000	6.10813
2005	6.24602
2010	5.49972
2015	5.01474
2020	4.81069
2025	4.86662
2030	5.04211
2035	5.05521
2040	4.89683
2045	4.68641
2050	4.58842
2055	4.65143
2060	4.80462
2065	4.93564
2070	4.95689
2075	4.89601
2080	4.82663
2085	4.81728
2090	4.85644
2095	4.90399
2100	4.91176