Question: On which years did Aruba got a footnote on the series code AG.LND.FRST.K2?
SQL: SELECT T2.Year FROM Country AS T1 INNER JOIN FootNotes AS T2 ON T1.CountryCode = T2.Countrycode WHERE T1.ShortName = 'Aruba' AND T2.Seriescode = 'AG.LND.FRST.K2'