The series debuted on July 12, 2002, on USA Network. It continued for eight seasons, with the final season concluding on December 4, 2009. The series held the record for the most-watched scripted drama episode in cable television history from 2009 through 2012 (broken by The Walking Dead) with "Mr. Monk and the End -- Part II", its series finale, with 9.4 million viewers, 3.2 million of them in the 18 -- 49 demographic.

Answer this question based on the passage: what year did monk go off the air? Okie... think carefully first, then make a decision:
This is the relevant information: It continued for eight seasons, with the final season concluding on December 4, 2009. So, the answer is 2009.