For how many consecutive years did Aruba get a footnote on the series code BX.KLT.DINV.CD.WD?
Aruba is the name of country where ShortName = 'Aruba'
SELECT COUNT(T2.Year) FROM Country AS T1 INNER JOIN FootNotes AS T2 ON T1.CountryCode = T2.Countrycode WHERE T1.ShortName = 'Aruba' AND T2.Seriescode = 'BX.KLT.DINV.CD.WD'