Year	Percent
1950	9.89677
1955	9.77923
1960	13.80597
1965	13.57222
1970	14.59181
1975	13.56603
1980	12.6829
1985	11.59001
1990	12.24088
1995	10.45591
2000	9.65977
2005	7.8225
2010	7.20748
2015	7.23048
2020	8.04582
2025	7.35521
2030	6.4524
2035	6.00462
2040	5.96629
2045	6.09081
2050	6.11943
2055	5.93157
2060	5.63303
2065	5.41508
2070	5.35928
2075	5.39252
2080	5.386
2085	5.27625
2090	5.1081
2095	4.96424
2100	4.90605