Year	Percent
1950	8.047
1955	9.70566
1960	12.11728
1965	14.2281
1970	13.46462
1975	10.28688
1980	9.38872
1985	9.18663
1990	9.8633
1995	9.86571
2000	8.12766
2005	5.67519
2010	5.28983
2015	6.00287
2020	6.18186
2025	5.58336
2030	4.93979
2035	4.46228
2040	4.30114
2045	4.43833
2050	4.59045
2055	4.53586
2060	4.30979
2065	4.11807
2070	4.0903
2075	4.22293
2080	4.39201
2085	4.46999
2090	4.42334
2095	4.32998
2100	4.2896