How long was it from when Bilbo left to Frodo's leaving?

Xkot, Netsloth, and I were having a lively discussion about the Lord of the Rings, and part of the discussion was around how long it was from when Bilbo left to when Frodo left the shire. I was doing a little research and found this summary on the net since I didn't have my book with me to confirm. When Bilbo left, Frodo was 33. Gandalf came back a couple of times over the years to see Frodo, but his final visit to Frodo was during Frodo's 50th year. Frodo left the shire on his 50th birthday.

More useless trivia for you. ;)