{"title":"Concentration averages of metals, micrograms per litre by size class, substance, observations and every other year","variables":[{"code":"Storleksklass","text":"size class","values":["75","78","98"],"valueTexts":["20 001–100 000","100 001–","Total concentration"]},{"code":"Substans","text":"substance","values":["Cd","Cr","Cu","Hg","Ni","Pb","Zn"],"valueTexts":["cadmium","chromium","copper","mercury","nickel","lead","zink"]},{"code":"ContentsCode","text":"observations","values":["000000PM"],"valueTexts":["Micrograms per litre"]},{"code":"Tid","text":"every other year","values":["2014","2016","2018","2020","2022"],"valueTexts":["2014","2016","2018","2020","2022"],"time":true}]}