CDC. National Biomonitoring Program: Mercury. https://www.cdc.gov/biomonitoring/Mercury_BiomonitoringSummary.html
Interesting also is the study showing RV for blood: Mortensen ME, Caudill SP, Caldwell KL, Ward CD, Jones RL. Total and methyl mercury in whole blood measured for the first time in the U.S. population: NHANES 2011-2012. Environmental research 2014; 134: 257-64.
Hope that there might be new data on inorganic exposures from NHANES .
UBA. Human Biomonitoringswerte. https://www.umweltbundesamt.de/themen/gesundheit/kommissionen-arbeitsgruppen/kommission-human-biomonitoring/beurteilungswerte-der-hbm-kommission 2018.
I don't know about the values in the US, but in 1986, I had a paper in the British Medical Journal, describing mercury poisoning in workmen who repaired sphygmomanometers (Brit Med J 1986;293:1409-10).
At that point, the upper 95th. centile for unexposed workers in the UK was
Thank you Christopher, I found the values (thanks to the CDC scientists).
Report (NER) from 2011-2012 95th%tile (4.03 female and 4.94 male). The latest data is from 2015-2016 95th%tile (3.95 female and 4.67 male). Urine mercury (measured as total) the latest we have posted in the NER is 2013-2014 (1.75 females and 1.55 males) Creatinine corrected (1.83 females and 1.31 males).