Year	Percent
1950	7.43322
1955	8.37277
1960	9.55045
1965	10.05931
1970	10.4174
1975	9.71784
1980	8.63363
1985	7.5963
1990	7.21425
1995	7.41262
2000	7.64094
2005	7.59084
2010	6.99213
2015	6.68955
2020	6.53456
2025	6.01975
2030	6.09165
2035	6.15282
2040	6.0946
2045	5.97642
2050	5.85399
2055	5.76109
2060	5.72425
2065	5.73306
2070	5.71602
2075	5.65479
2080	5.5801
2085	5.52006
2090	5.49383
2095	5.47899
2100	5.46105