Year	Percent
1950	8.68768
1955	7.75214
1960	7.24952
1965	8.25642
1970	8.33203
1975	7.26327
1980	7.30589
1985	7.10697
1990	6.84856
1995	7.1728
2000	6.71633
2005	5.9545
2010	4.83584
2015	4.39492
2020	4.26707
2025	4.9236
2030	5.18091
2035	5.00588
2040	4.67932
2045	4.3959
2050	4.36554
2055	4.61272
2060	4.92059
2065	5.04899
2070	4.96471
2075	4.8104
2080	4.742
2085	4.80742
2090	4.9277
2095	4.99387
2100	4.94115