|
I use commas for thousands, whatever the number.
-
We don't use commas in years, because nobody pays attention to the first two numbers.
-
It's easier to remember numbers broken down into groups... thus, 2015 is broken into 20 15... and read by most as '15. You will only ever have to read those last two numbers.
Doing it as 2 015 doesn't make sense, because then you have an extra large group '015... ain't nobody got time... literally... for three number years.
|