Total online job ads were 4,374,400 in May, an increase of 9,000 or 0.2 percent from April, according to The Conference Board Help-Wanted OnLine Data Series(TM). Online advertised vacancies continue to be up substantially (29 percent) over the year (May'06 - May'07). There were 2.9 advertised vacancies online for every 100 persons in the labor force in May.