Year	Percent
1950	6.98831
1955	6.49988
1960	6.01208
1965	6.06658
1970	6.20338
1975	7.32803
1980	8.16931
1985	7.51676
1990	6.37281
1995	5.58071
2000	5.74475
2005	5.83634
2010	5.89173
2015	5.61543
2020	5.04383
2025	5.15144
2030	4.98546
2035	4.87716
2040	4.83918
2045	4.83034
2050	4.82679
2055	4.8126
2060	4.80095
2065	4.80547
2070	4.81652
2075	4.83209
2080	4.8411
2085	4.83295
2090	4.81132
2095	4.79134
2100	4.768