The first two partsof this little exploration looked at DC’s attempts to launch ongoing series in the ‘80s and ‘90s, when line-wide events became regular occurrences in the superhero line. However, as those surveys made abundantly clear, said events didn’t seem to relate much either to concurrently-launched ongoing series or to the relative success of said series.
Instead, the number of new ongoing series debuting in a particular calendar year looks somewhat cyclical. There were five new ongoings in 1985 (the year of Crisis On Infinite Earths), up to 14 in 1988 and 17 in 1992, then easing down to 15 in 1994, 13 in 1996, and 10 in 1997. In 1998 and 2000, DC launched only four new ongoing series; in 1999, six; and in 2001, seven. At the risk of exciting you too quickly with more numbers, a later year will have sixteen.
For now, though, we pick up in 2002, at the beginning of a quieter time.