Year	Percent
1950	12.361
1955	15.86238
1960	17.32749
1965	16.81852
1970	15.7561
1975	15.17247
1980	14.18826
1985	13.63571
1990	13.02728
1995	11.76647
2000	8.65471
2005	7.66803
2010	7.74886
2015	7.75682
2020	7.35469
2025	6.97231
2030	6.25636
2035	5.67447
2040	5.50684
2045	5.53817
2050	5.51937
2055	5.37814
2060	5.15141
2065	4.94949
2070	4.87609
2075	4.9218
2080	4.98294
2085	4.98255
2090	4.90876
2095	4.81347
2100	4.75113