Growth depend on a lot of factors including the animal itself.
Here are some comparison with some of my animals.
I have several 09 females that are a little over 1000 grams, while I have and 07 females that is almost 1000 grams.
I also have a 06 females that is around 1300 and that I will be breeding for the first time this season (even though I prefer to breed big girls over 1800 grams), she is a slow grower (healthy but not a great feeder and growing slowly) and I believe she will never get much bigger than what she is now, so given she is 4 years old and finally at a good weight I will finally breed her.
Remember breeding is not a competition it might take time for some animals to get up to size and some animals might be up to size but not breed anyway.
Key word when breeding: PATIENCE