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. Author manuscript; available in PMC: 2021 Oct 1.
Published in final edited form as: Am J Ind Med. 2020 Aug 9;63(10):859–867. doi: 10.1002/ajim.23167

Table 1.

Yearly average mine concentration of 222Rn for the Jáchymov region

222Rn concentration in pCi/l WL Measurementsa Minesb

Year Mean S.D. Range Estimated N N
1924 2982.1 2858.1 291–8954 26.3 12 2
1928 4138.7 3273.5 633–7116 36.6 3 1
1930 2816.7 2077.6 0–7728 24.9 70 3
1932 613.5 504.1 36–1965 3.3 36 3
1933 223.3 213.7 0–659 1.2 15 1
1934 839.4 496.3 36–2293 4.5 33 3
1948 2000 17.7 >308 7
1949 1016.3 607 466–1913 9 1476 7
1950 1058.6 401.7 533–1547 9.4 4113 7
1951 889.6 499.9 248–1336 4.8 453 5
1952 401.5 168 111–629 2.2 308 14
1953 520.3 171.9 326–818 2.8 2750 12
1954 425.9 117.7 233–659 2.3 3639 15
1955 397.3 144.9 215–625 2.1 4331 12
1956 389.6 216.5 104–810 2.1 3539 11
1957 344.3 147.2 71–515 1.9 771 11
1958 188.9 152.9 20–437 1 996 10
1959 402.4 215.4 85–710 2.2 685 9
1960 342.5 248 85–760 1.9 573 8
1961 270 - - 1.5 - 2
1962 300 - - 1.6 - 1
a.

Total number of measurements on which the mine means were based.

b.

Number of mine averages on which the presented means are based.

c.

For year 1948 the value from 1950 was assigned

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