Here are two diagrams that show how often the main and supporting characters of Sandra and Woo appeared in each year. Note that there were only 20 strips in 2008.

You can click on the images for larger versions.

Here is the total number of occurrences:

Sandra: 607 (52% of all strips) Woo: 405 (35%) Larisa: 382 (33%) Cloud: 251 (22%) Richard: 109 (9%) Ye Thuza: 101 (9%) Lily: 87 (7%) Yuna: 80 (7%) Zoey: 80 (7%) Sid: 65 (6%) Landon: 55 (5%) Shadow: 52 (4%) Luna: 51 (4%)

Notable characters who have not appeared in at least 50 strips yet are:

Butterfly: 38 (3%)

38 Woo’s kits: 32 at most (3%)

32 at most Michelle: 28 (2%)

28 Ruth: 24 (2%)

24 Seeoahtlahmakaskay: 24 (2%)

24 Taylor: 19 (2%)

Number of new strips per year: