Why isn't my cherry tree producing much fruit?

Last year my Cherry Tree (Bing) produced so much fruit we picked 4 to 5 gallon sized bags of fruit every night for weeks.. This year I picked everything I could reach in about 10 minutes and it fills 1/4th of a gallon bag. Does anybody know the reason for the lack of fruit this year? I live in the Northwest

Pam

I will send you a neat link I found, for further info on you're issue...
I am still doing more research on it right now... but Will send you the link, if you would like to research the resources I've 'dug-up'