Year	Percent
1950	8.93408
1955	10.29387
1960	6.83623
1965	6.73692
1970	8.2134
1975	8.98104
1980	8.84892
1985	7.68394
1990	7.09035
1995	7.10342
2000	7.47443
2005	8.30595
2010	7.36743
2015	5.3891
2020	4.83948
2025	5.79871
2030	6.56903
2035	6.09424
2040	5.57417
2045	5.25407
2050	5.27095
2055	5.51384
2060	5.7026
2065	5.63322
2070	5.39151
2075	5.19896
2080	5.17166
2085	5.25589
2090	5.31952
2095	5.26896
2100	5.12172