select *from #ResultData WHERE YEAR(CONVERT(date, '01-' + Monthformat)) = YEAR(GETDATE()) - 1;
--Getting current Year

select *from #ResultData WHERE YEAR(CONVERT(DATE, '01-' + Monthformat)) = YEAR(GETDATE()) AND MONTH(CONVERT(DATE, '01-' + Monthformat)) <= MONTH(GETDATE());
--Getting previous Year