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["1970-01-01",49.3,null,null]
["1976-01-01",37.7,null,null]
["1979-01-01",37.4,null,null]
["1984-01-01",20.7,6.9,null]
["1987-01-01",19.4,5.1,null]
["1989-01-01",16.5,3.9,null]
["1992-01-01",12.4,2.9,null]
["1995-01-01",8.7,2.0,19.5]
["1997-01-01",6.1,1.4,19.7]
["1999-01-01",7.5,1.4,19.0]
["2002-01-01",5.1,1.0,20.0]
["2004-01-01",5.7,1.2,19.9]
["2007-01-01",3.6,0.7,17.4]
["2009-01-01",3.8,0.7,19.3]
["2012-01-01",1.7,0.2,19.2]
["2014-01-01",0.6,0.1,15.6]
["2016-01-01",0.4,0.0,15.9]
["2019-01-01",5.6,0.4,16.9]
["2020-01-01",8.4,1.0,16.2]
["2022-01-01",6.2,0.2,16.6]
["2024-01-01",5.1,0.09,16.7]