Lou Dobbs will celebrate one year of hosting his “Lou Dobbs Tonight” on Fox Business Network tomorrow. After spending most of his career at CNN, Dobbs joined FBN in November 2010, with the show bowing four months later.

Dobbs has had the top rated show on FBN since his return to cable news and last week, “Lou Dobbs Tonight” averaged 163,000 Total Viewers and 45,000 A25-54 viewers — his best yet in the younger demo. And for the first time last week, Dobbs topped his business channel competitor, CNBC’s Larry Kudlow, in younger viewers. (45,000 v. 38,000). Kudlow still topped Dobbs in Total Viewers (163,000 vs. 150,000).

The Fox numbers are a far cry from what Dobbs averaged on CNN. In October 2009, his final full month with the network, Dobbs’ 7pm show averaged 631,000 Total Viewers and 163,500 A25-54 viewers. (CNN is in 99 million homes and FBN is in 58 million.)

As a result of the FBN primetime shake-up last month, Dobbs’ show also gets another run in primetime, at 10pmET.