Year	Percent
1950	7.80482
1955	7.06765
1960	7.27901
1965	7.33137
1970	8.51835
1975	7.26335
1980	5.55552
1985	6.20394
1990	6.99455
1995	7.76082
2000	6.08097
2005	5.82943
2010	5.84013
2015	4.86211
2020	4.68622
2025	4.80801
2030	4.55151
2035	4.56791
2040	4.58611
2045	4.59168
2050	4.52717
2055	4.51332
2060	4.56587
2065	4.61945
2070	4.68005
2075	4.73616
2080	4.76112
2085	4.76338
2090	4.76605
2095	4.77486
2100	4.78245