How old were those who entered the promised land?

In Numbers 13:25-33 we read that 10 of the 12 spies sent up to the land by Moses reported that the people there were too strong for the Israelites to overcome.

In Numbers Chapter 14 we read that nearly all the people were frightened and rebelled. Joshua and Caleb had confidence that they could do it with God's help. As a consequence, in Numbers 13:29-30 God told them that none of those then present from the age of 20 and upwards would enter into the promised land except Joshua and Caleb and that they would wander in the wilderness for 40 years. From this we can calculate that except for Joshua and Caleb, all the Israelites who entered the promised land were no older than 59.