Hello Fishmen!

380 big fat magikarps, out of 2611 caught gives a 14,6% catch rate for big fish... Very similar to your catch rate of 14,8%

137/963(Seen 1013)

I just finished last week, thanks to the kanto event. Had been stuck in 294 for ages. Currently 309 out of 2098 caught.

181/1083/1119. 16.7% Should reach gold sometime in 2021...

I'm at 191 out of 1267, giving a percentage of 15% fat karps. I was amazed at my 1 out of 50 streak at the start of the event tho.

According to the maths, I should continue to catch 726 more karbs before obtaining the gold medal. The very last one of the starter medals.

Seen: 1725
Caught: 1599
Badge: 245/300

Still some way to go.
Two of my current goals is to reach gold in this one and the tiny Rattata one (86 to go there).

Also, apart from an event where the rate of shiny Magikarp was increased (sort of like Community Day) I haven't found a single shiny Magikarp.

322 fat karp out of 2265 caught

looks like you have a good ratio there

I have a number of people saving Karp for me to boost my luckies. That said I was over 750 before trading came out and most of my trades are not big ones

374 out of 2293 caught

367/2468 = 14.9%

214/1402 including one that I traded for.

427/2859, 14,9% ratio. Finished it at some of the events earlier this year but regrettably didn't screenshot the pokedex page then.

Looks like 15% is the going rate as we're not dealing with small sample sizes. 112/743 for me (15.1%).