Permafrost region:,non-permafrost,non-permafrost,non-permafrost,sporadic,sporadic,sporadic,discontinuous,discontinuous,discontinuous,continuous,continuous,continuous
,Start,End,length,Start,End,length,Start,End,length,Start,End,length
2011,80,130,51,105,138,34,109,149,41,114,167,54
2012,76,129,54,106,136,31,110,150,41,126,163,38
2013,74,130,57,113,140,28,117,148,32,121,168,48
2014,72,130,59,100,138,39,102,154,53,125,170,46
2015,71,129,59,105,134,30,114,148,35,127,167,41
2016,61,126,66,97,139,43,114,147,34,126,165,40
2017,75,132,58,93,142,50,115,150,36,132,171,40
2018,82,131,50,92,148,57,113,155,43,126,168,43
2019,77,127,51,94,137,44,114,150,37,128,165,38
2020,70,130,61,100,139,40,103,152,50,124,169,46
2021,69,129,61,99,137,39,113,150,38,125,168,44
mean,73,129,57,100,139,40,111,150,40,125,167,43