Year	Percent
1950	7.69384
1955	7.42693
1960	9.97742
1965	8.91187
1970	8.32908
1975	7.03025
1980	7.26972
1985	7.28733
1990	7.31321
1995	6.87395
2000	5.61714
2005	4.59196
2010	4.27564
2015	5.30469
2020	5.51384
2025	5.37344
2030	5.06768
2035	4.73706
2040	4.62406
2045	4.83956
2050	5.14704
2055	5.26757
2060	5.1707
2065	5.01515
2070	4.95254
2075	5.03779
2080	5.19547
2085	5.27966
2090	5.22904
2095	5.09654
2100	4.99396