Year	Percent
1950	7.07176
1955	7.93593
1960	9.39403
1965	9.25125
1970	9.50531
1975	9.06512
1980	8.48794
1985	8.30455
1990	7.05857
1995	6.96594
2000	6.76853
2005	6.65628
2010	6.08988
2015	5.76639
2020	6.14606
2025	6.15956
2030	6.20407
2035	5.95009
2040	5.70077
2045	5.52708
2050	5.50212
2055	5.5447
2060	5.55998
2065	5.49202
2070	5.37776
2075	5.26724
2080	5.19582
2085	5.16784
2090	5.14176
2095	5.094
2100	5.0177