Crab apples - NOT amateur radio

We have one crab apple tree. Two years ago we had about 500 fruits and made crab apple jelly which is delicious with some meats. Last year we had just 15!  This year we have a bumper crop as the photo shows. Someone once told me these are good every other year.

See https://www.bbcgoodfood.com/recipes/7661/crab-apple-jelly