Poll - Classics?

How old does an anime have to be to be a classic (ignoring "instant classics")?

At least 10 years old 1289 (42.9%)
At least 5 years old 662 (22.0%)
At least 15 years old 444 (14.8%)
At least 20 years old 354 (11.8%)
At least 2 years old 188 (6.3%)
At least 30 years old 40 (1.3%)
At least 40 years old 30 (1.0%)

Total number of votes: 3007