Basically the first number didn't really have any meaning, so it was removed, so the major versions (which I believe are released once a year) are: 9.2 (releas

Basically the first number didn't really have any meaning, so it was removed, so the major versions (which I believe are released once a year) are: 9.2 (released in 2012) 9.3 9.4 9.5 9.6 10 11 12 13 (about to be released this year?) That's still a lot of versions in between, each of them as new functionality and requires converting the database to upgrade.