Poll Results

Total votes: 711

Over a year: 229 (32.2%)
Six months to a year: 182 (25.6%)
Since 2002!: 94 (13.2%)
Three to six months: 94 (13.2%)
One to three months: 68 (9.6%)
Less than a month: 27 (3.8%)
Er... about 30 seconds: 17 (2.4%)

I must say I'm surprised at how many people have been reading Irregular Webcomic! since 2002, considering only one strip appeared in that year, on 31 December.