I noticed the stat gain slowdown around 60. (Just like all skills.)
All of my stats are 80's - Capped now, except Intelligence, which is close to 65. I've done afk swimming since I got my house on Geodin's Song, have also gathered a shit ton even when at the PC. Stat gains from different types of gathering is NASTY & on top of that, Herbalism FTW when leveling INT. (Just a head's up for you others.)
Have any questions, feel free to ask. I've personally been afk a lot lately, so have been macro'ing a lot with my screen on. So feel free to PM me. And of course, others will definitely answer you here too.