I do, but I didn't learn until I was 11.
Took me a long time too, i'm not sure when I did start learning it, but probably around 9-10 too. Swimming is mandatory in Belgium, and people basically sh**t on you if you can't swim. You're not part of it. Teachers have been hard on me because I couldn't swim.
I remember having failing to get to 25m swimming, stopping at 23 metres, because i got afraid... Eventually i got a lot better in this, and my speed is about average now while my stamina is probably even above average.