Year	Percent
1950	13.85828
1955	9.55628
1960	15.7054
1965	13.04671
1970	15.67424
1975	13.69434
1980	9.08842
1985	9.54164
1990	9.12792
1995	9.05864
2000	8.24462
2005	7.62467
2010	6.7789
2015	6.47308
2020	6.40404
2025	6.2784
2030	6.00539
2035	5.63051
2040	5.30445
2045	5.1496
2050	5.14936
2055	5.16236
2060	5.0977
2065	4.96385
2070	4.83941
2075	4.77798
2080	4.78735
2085	4.81313
2090	4.80208
2095	4.74864
2100	4.68423