Year	Percent
1950	8.12774
1955	7.33802
1960	7.5738
1965	7.70536
1970	9.00258
1975	7.67375
1980	5.9044
1985	6.60572
1990	7.46556
1995	8.30864
2000	6.51973
2005	6.25499
2010	6.29374
2015	5.24288
2020	5.05005
2025	5.15123
2030	4.88127
2035	4.88905
2040	4.8943
2045	4.88361
2050	4.79836
2055	4.76885
2060	4.80926
2065	4.84709
2070	4.88914
2075	4.92623
2080	4.93437
2085	4.92331
2090	4.9153
2095	4.91639
2100	4.9191