I was interested to see how many IG followers a month they all gain. Granted, this changes all the time based on what they're doing career wise, but according to SocialBlade this is how they rank per month:
Candice +286,800
Adriana +265,830
Taylor +236,190
Alessandra +204,870
Sara +196,950
Josephine +172,860
Lily +119,430
Behati +104,730
Elsa +84,090
Romee +65,310
Martha +65,220
Jasmine +46,860
Stella +46,290
Lais +18,540
Other things I noticed:
Candice, Adriana, Taylor, Alessandra, Sara and Behati get the most likes per photo (most photos get around 90 - 200k likes, with Candice sometimes above 200k). Lily, Elsa, Romee, Josephine are next (most photos get 40 - 80k likes). Then it's Martha, Jasmine, Stella and Lais (most photos get 10 - 40k likes).
Lily and Martha's follower counts skyrocketed in May after the Bad Blood video.
All the girls see increases in November and December (VSFS), which isn't surprising.