Year	Percent
1950	10.25631
1955	9.45791
1960	12.50104
1965	11.33111
1970	10.01512
1975	9.65798
1980	7.282
1985	7.69654
1990	8.01331
1995	7.63755
2000	7.06233
2005	6.64082
2010	5.58314
2015	4.71895
2020	4.65878
2025	4.89778
2030	4.95587
2035	4.97304
2040	4.80646
2045	4.53236
2050	4.36497
2055	4.40493
2060	4.55732
2065	4.67779
2070	4.69658
2075	4.63687
2080	4.56384
2085	4.56091
2090	4.63649
2095	4.72586
2100	4.75527