{"Month":"January","Year":1983,"Unadj.Conc":1.99,"Adj.Conc":2.11}
{"Month":"February","Year":1983,"Unadj.Conc":2.1,"Adj.Conc":2.14}
{"Month":"March","Year":1983,"Unadj.Conc":2.12,"Adj.Conc":2.1}
{"Month":"April","Year":1983,"Unadj.Conc":2.12,"Adj.Conc":2.13}
{"Month":"May","Year":1983,"Unadj.Conc":2.11,"Adj.Conc":2.12}
{"Month":"June","Year":1983,"Unadj.Conc":2.15,"Adj.Conc":2.12}
{"Month":"July","Year":1983,"Unadj.Conc":2.19,"Adj.Conc":2.11}
{"Month":"August","Year":1983,"Unadj.Conc":2.18,"Adj.Conc":2.1}
{"Month":"September","Year":1983,"Unadj.Conc":2.16,"Adj.Conc":2.11}
{"Month":"October","Year":1983,"Unadj.Conc":2.08,"Adj.Conc":2.1}
{"Month":"November","Year":1983,"Unadj.Conc":2.05,"Adj.Conc":2.11}
{"Month":"December","Year":1983,"Unadj.Conc":2.08,"Adj.Conc":2.09}
{"Month":"January","Year":1984,"Unadj.Conc":2.01,"Adj.Conc":2.13}
{"Month":"February","Year":1984,"Unadj.Conc":2.1,"Adj.Conc":2.14}
{"Month":"March","Year":1984,"Unadj.Conc":2.17,"Adj.Conc":2.15}
{"Month":"April","Year":1984,"Unadj.Conc":2.13,"Adj.Conc":2.14}
{"Month":"May","Year":1984,"Unadj.Conc":2.13,"Adj.Conc":2.14}
{"Month":"June","Year":1984,"Unadj.Conc":2.18,"Adj.Conc":2.15}
{"Month":"July","Year":1984,"Unadj.Conc":2.25,"Adj.Conc":2.17}
{"Month":"August","Year":1984,"Unadj.Conc":2.24,"Adj.Conc":2.16}
{"Month":"September","Year":1984,"Unadj.Conc":2.22,"Adj.Conc":2.17}
{"Month":"October","Year":1984,"Unadj.Conc":2.13,"Adj.Conc":2.15}
{"Month":"November","Year":1984,"Unadj.Conc":2.08,"Adj.Conc":2.14}
{"Month":"December","Year":1984,"Unadj.Conc":2.16,"Adj.Conc":2.17}
{"Month":"January","Year":1985,"Unadj.Conc":2.15,"Adj.Conc":2.27}
{"Month":"February","Year":1985,"Unadj.Conc":2.17,"Adj.Conc":2.21}
{"Month":"March","Year":1985,"Unadj.Conc":2.27,"Adj.Conc":2.25}
{"Month":"April","Year":1985,"Unadj.Conc":2.23,"Adj.Conc":2.24}
{"Month":"May","Year":1985,"Unadj.Conc":2.24,"Adj.Conc":2.25}
{"Month":"June","Year":1985,"Unadj.Conc":2.26,"Adj.Conc":2.23}
{"Month":"July","Year":1985,"Unadj.Conc":2.31,"Adj.Conc":2.23}
{"Month":"August","Year":1985,"Unadj.Conc":2.32,"Adj.Conc":2.24}
{"Month":"September","Year":1985,"Unadj.Conc":2.28,"Adj.Conc":2.23}
{"Month":"October","Year":1985,"Unadj.Conc":2.22,"Adj.Conc":2.24}
{"Month":"November","Year":1985,"Unadj.Conc":2.19,"Adj.Conc":2.25}
{"Month":"December","Year":1985,"Unadj.Conc":2.22,"Adj.Conc":2.23}