Earlier quoted context omitted.
I can't help thinking that people here in Scotland with convertibles (of which there are a surprising number) would probably use less than you per year ;-)
Can you elaborate please? I’m not getting the reference unless it’s some kilt thing
(I imagine the Californian poster is changing twice per year too, just using 5-6 ties. With that reading the joke is Hey in Scotland you just keep it closed, never need any more ties.)