Year	Percent
1950	9.9992
1955	9.0472
1960	8.96369
1965	8.67598
1970	10.5401
1975	11.94607
1980	8.50447
1985	6.39888
1990	6.66669
1995	6.55654
2000	6.95103
2005	6.65777
2010	4.68366
2015	4.54356
2020	3.71399
2025	4.12827
2030	4.26722
2035	4.14524
2040	4.1803
2045	4.15178
2050	4.11322
2055	3.84579
2060	3.60283
2065	3.49665
2070	3.49624
2075	3.53301
2080	3.54386
2085	3.52843
2090	3.51326
2095	3.54296
2100	3.63886