[ADD] Adding the i variable

src/libs/routes_v1/yearsOfStudy.js

@@ -516,7 +516,7 @@ PnadNovoApp.get('/', rqf.parse(), rqf.build(),  (req, res, next) => {
     
     let teste = "pnad_novo.ano_ref = media.ano_ref"
     if (req.dims) {
-        for (i in req.dims) {
+        for (let i in req.dims) {
             teste += ` and pnad_novo.${i.table} = media.${i.tableField}`
         }
     }