Year	Percent
1950	11.50969
1955	11.25786
1960	10.49346
1965	11.49467
1970	11.80002
1975	12.20384
1980	11.72533
1985	11.0566
1990	11.69855
1995	12.8739
2000	12.38088
2005	11.74898
2010	11.21979
2015	10.59423
2020	10.18872
2025	9.6161
2030	9.17693
2035	8.69382
2040	8.22909
2045	7.8031
2050	7.41614
2055	7.08397
2060	6.76553
2065	6.49409
2070	6.24626
2075	6.04472
2080	5.87522
2085	5.72997
2090	5.60233
2095	5.4913
2100	5.40015