Year	Percent
1950	7.91035
1955	7.55499
1960	9.1328
1965	9.20099
1970	8.14259
1975	8.4137
1980	11.04674
1985	9.86344
1990	9.3212
1995	7.4456
2000	7.93007
2005	7.17773
2010	6.84216
2015	6.09472
2020	5.94157
2025	6.49926
2030	6.01078
2035	5.65251
2040	5.46494
2045	5.46453
2050	5.48388
2055	5.39727
2060	5.25106
2065	5.04339
2070	4.90765
2075	4.81052
2080	4.72826
2085	4.621
2090	4.49816
2095	4.39026
2100	4.30619