Year	Percent
1950	7.24646
1955	7.77957
1960	8.50629
1965	7.54388
1970	7.00705
1975	8.23056
1980	9.13854
1985	8.78436
1990	7.09498
1995	6.08944
2000	6.29166
2005	6.25372
2010	6.28972
2015	5.52105
2020	5.00425
2025	4.81253
2030	4.88682
2035	5.08706
2040	5.12105
2045	4.97776
2050	4.78035
2055	4.69141
2060	4.75777
2065	4.90677
2070	5.03207
2075	5.05059
2080	4.98749
2085	4.91113
2090	4.88935
2095	4.91581
2100	4.95607