Year	Percent
1950	12.89497
1955	12.84102
1960	14.31345
1965	15.81908
1970	13.48223
1975	10.38041
1980	9.25011
1985	7.58911
1990	7.02002
1995	7.09729
2000	7.71814
2005	6.59108
2010	5.71521
2015	5.08496
2020	4.74432
2025	4.43684
2030	4.2048
2035	4.08236
2040	3.91866
2045	3.75562
2050	3.64077
2055	3.58493
2060	3.56983
2065	3.57344
2070	3.56663
2075	3.54219
2080	3.50792
2085	3.48889
2090	3.47534
2095	3.47197
2100	3.4647