Year	Percent
1950	6.92606
1955	6.39069
1960	7.21421
1965	8.12768
1970	7.09964
1975	7.09973
1980	7.55496
1985	7.30944
1990	6.17384
1995	5.37876
2000	5.4937
2005	5.60203
2010	5.59998
2015	5.04668
2020	4.76623
2025	4.6977
2030	4.85845
2035	5.04652
2040	4.95874
2045	4.79569
2050	4.6417
2055	4.58596
2060	4.65051
2065	4.76846
2070	4.83087
2075	4.8088
2080	4.73174
2085	4.66451
2090	4.6352
2095	4.63599
2100	4.63987