Once pears start bearing fruit they should continue to do so each year. however it is normal for at least two drops of fruit to get rid of the excess fruits that will not mature. This happens within a month of bloom time. If you still have tons of fruit on the trees after this time, it is wise to thin them by hand and only let a small percentage of the fruits mature. The fruits are carried on fruiting spurs so they appear in clusters. Pears should only have 2 fruits per cluster with these about 5" apart on the branch.
By now you will have built up a strong framework for the trees over the past years, so you can look forward to good fruit crop each year.