Who said "I had nothing, and I still have most of it left."?

This quote is attributed to Snoopy.

I had nothing, and I still have most of it left. - Snoopy

"I had nothing, and I still have most of it left."

Snoopy Money

"I think I'm dying. Send for a doctor immediately!"

"Rats! Another day, another disappointment."

"Sometimes I lie awake at night and ask, 'Is life a multiple choice test or an essay?' Then a dog barks and I realize it doesn't matter."

"I love mankind. It's people I can't stand."

"Money is important, but it's not everything"

"Money doesn't buy happiness, but it buys things that make you forget you're unhappy."

"Money isn't everything."

"Money is meaningless without purpose."