My understanding is that it was 22 last year, and 74 the year prior. I'm not sure that you can get in without the login.
The Ob numbers are as follows:
Region: Offered: Unfilled:
Western 160 2
Central 271 0
Southern 339 4
Northeastern 385 0
Total: 1155 6
Western region: Draw a line N-S from Montana to N.Mexico - everything west included.
Central region: East of that same border to line drawn between Ohio and Pennsylvania, northern border with canada, southern border includes with Kansas, Missouri, Illinois, Indiana, Ohio.
Southern region: Everything south of the states listed above, extends to east coast, includes West Virginia, Virginia.
Northeastern region: Everything east of Ohio and north of West Virginia/Virginia border with Maryland.
(sorry, couldn't get the map to copy).