There's so much information to parse out here about Oscar's history with the hand or computer drawn division of their industry. This was created by Border Stylo. Isn't it neat?
I wish the information was more complete (i.e nominations by film, too) but it's pretty cool as is. It's not surprising but definitely interesting that 66% of the nominations gathered by the animation genre are in the aural categories (Song, Score and the Sound categories)
For the record, to add to this chart the most nominated animated films are the following.
BEAUTY & THE BEAST (1991) including Best Picture
(I think it's worth noting that even if you subtracted one of these nominations -- given that films can no longer get 3 song nominations by the rules, you'd still have to add it back in if there were animated feature prizes to be won in the 90s. Beauty & The Beast is still the champ, Oscar wise. It's the one that changed the way Oscar thought of Animated Features... with a little help from it's lead in The Little Mermaid of course.)
UP (2009) including Best Picture
TOY STORY 3 (2010) including Best Picture
THE LION KING (1994)
MONSTERS, INC (2001)
FINDING NEMO (2003)
THE INCREDIBLES (2004)
What'cha think about that?