"period","month","departure_ppm"
"1960-1969",1,-0.0841430063333693
"1960-1969",2,0.441800986110053
"1960-1969",3,1.16241169113999
"1960-1969",4,2.29630200700947
"1960-1969",5,2.84231638158881
"1960-1969",6,2.25826037403217
"1960-1969",7,0.949274748611402
"1960-1969",8,-1.13578125894524
"1960-1969",9,-2.77383726650172
"1960-1969",10,-3.0867998876766
"1960-1969",11,-1.96690957180707
"1960-1969",12,-0.9028951972279
"1970-1979",1,-0.116843139105464
"1970-1979",2,0.577958413731151
"1970-1979",3,1.37532419174178
"1970-1979",4,2.41901849124525
"1970-1979",5,2.85282107519059
"1970-1979",6,2.23481330061925
"1970-1979",7,0.859021063822778
"1970-1979",8,-1.18498671074856
"1970-1979",9,-2.98499448531979
"1970-1979",10,-3.07177480507929
"1970-1979",11,-2.01881833076161
"1970-1979",12,-0.941539065336081
"1980-1989",1,-0.0926742803142296
"1980-1989",2,0.559384798637464
"1980-1989",3,1.408443877589
"1980-1989",4,2.62734696503873
"1980-1989",5,3.08240604399026
"1980-1989",6,2.43346512294182
"1980-1989",7,0.781368210391539
"1980-1989",8,-1.38957271065691
"1980-1989",9,-3.15051363170537
"1980-1989",10,-3.25161054425565
"1980-1989",11,-2.0975514653041
"1980-1989",12,-0.91049238635256
"1990-1999",1,0.0959431132835748
"1990-1999",2,0.841828407479882
"1990-1999",3,1.64671370167611
"1990-1999",4,2.70144639718595
"1990-1999",5,3.09933169138218
"1990-1999",6,2.31421698557842
"1990-1999",7,0.633949681088252
"1990-1999",8,-1.59416502471551
"1990-1999",9,-3.47327973051927
"1990-1999",10,-3.34454703500943
"1990-1999",11,-2.1086617408132
"1990-1999",12,-0.812776446616964
"2000-2009",1,0.279408709300365
"2000-2009",2,0.855661392074302
"2000-2009",3,1.53891407484818
"2000-2009",4,2.6689677812509
"2000-2009",5,2.98222046402477
"2000-2009",6,2.30447314679864
"2000-2009",7,0.49952685320136
"2000-2009",8,-1.70222046402476
"2000-2009",9,-3.22096778125089
"2000-2009",10,-3.33291407484817
"2000-2009",11,-2.08966139207429
"2000-2009",12,-0.783408709300412
"2010-2019",1,0.278242395959337
"2010-2019",2,0.855157117211674
"2010-2019",3,1.52707183846393
"2010-2019",4,2.76474876226276
"2010-2019",5,3.363663483515
"2010-2019",6,2.35457820476726
"2010-2019",7,0.361255128566082
"2010-2019",8,-1.88383015018166
"2010-2019",9,-3.50791542892941
"2010-2019",10,-3.40623850513058
"2010-2019",11,-1.97332378387832
"2010-2019",12,-0.733409062626081
"2020-2025",1,0.144586950221053
"2020-2025",2,0.950058933254597
"2020-2025",3,1.30386424962169
"2020-2025",4,2.67908469842146
"2020-2025",5,3.07455668145521
"2020-2025",6,2.51502866448899
"2020-2025",7,0.460249113288752
"2020-2025",8,-1.93427890367748
"2020-2025",9,-3.29380692064372
"2020-2025",10,-3.23191980517729
"2020-2025",11,-1.92311448881018
"2020-2025",12,-0.744309172443086
