Year	Percent
1950	9.39685
1955	12.0454
1960	7.64395
1965	8.44134
1970	9.98844
1975	9.34464
1980	8.61723
1985	7.31917
1990	7.68431
1995	7.80553
2000	8.51038
2005	8.10085
2010	6.66684
2015	5.2366
2020	4.93789
2025	6.16436
2030	6.45871
2035	6.32178
2040	5.96105
2045	5.53995
2050	5.373
2055	5.60185
2060	5.94664
2065	6.07197
2070	5.9255
2075	5.68247
2080	5.52703
2085	5.53709
2090	5.64371
2095	5.69953
2100	5.63511