Year	Percent
1950	10.39012
1955	9.29014
1960	12.74388
1965	12.05719
1970	10.53168
1975	10.2664
1980	7.61225
1985	8.06979
1990	8.32186
1995	7.91875
2000	7.29431
2005	6.85471
2010	5.72491
2015	4.78413
2020	4.84927
2025	5.0452
2030	5.05798
2035	5.06729
2040	4.88721
2045	4.59935
2050	4.42133
2055	4.45752
2060	4.61007
2065	4.7324
2070	4.75506
2075	4.69899
2080	4.6273
2085	4.62613
2090	4.70226
2095	4.7911
2100	4.82168