How many puppies in an average golden retriever litter?

How many puppies are usally in a litter to golden retriever. My puppy was in a litter of 4 but my sisters was in a litter of 7!

ALL DOGS ARE DIFFERENT IN LITTER SIZES THEY CAN HAVE ONE AND UP 15 I HEAR BUT IT ALL DEPENDS ON THE DOG NOT THE BREED. I KNOW MOST SMALLER BREED DOGS SUCH AS YORKIES, CHIS, AND OTHERS AROUND THAT SIZED USUALLY ONLY HAVE LIKE 2 TO 3 TOPS BUT IN SOME RARE CASES THEY CAN HAVE MORE BUT NOT THAT OFTEN. WITH BIGGER DOGS SUCH AS THE GOLDENS, BULLDOGS, LABS, AND THE OTHER LARGER DOGS THEY HAVE A GOOD HAND FULL OF PUPS BUT THAT TOO VARIES IN NUMBERS. MY BULLDOG HAD 8 HER FIRST LITTER AND 9 HER SECOND BUT MY RED NOSE YRS AGO HAD 9 AND THEY ARE TWO DIFFERENT SIZES SO IT REALLY JUST DEPENDS ON THAT PARTICULAR DOG.