How Many People are Going to be Exalted?

I finished reading chapter 2 of the “Odds Are You are Going to be Exalted”, book. In chapter two he is trying to make a point as to how many people have been and will be, exalted in the history of the earth. He listed and talked about several groups:
1. A third part of Heaven followed Satan. Note, it is not 1/3 or 33%, it is a third part. A third part of what number? A third part can be a third part of a certain group, a symbolic number meaning a fraction of people followed Satan, or an unknown number. So, in the end, there is an unknown number that will not be exalted, because they followed Satan.
2. The norm from the time of Enoch to, and including many in Noah’s day, was to translate those who became repentant, and started keeping the commandments, as best they could, and thus many of them were saved and exalted with the City of Enoch.
3. Our Church teaches all those who die before the age of accountability are exalted. According to historians, 51% of all people ever born on earth have died before the age of eight.
4. All people who are mentally handicapped are not accountable, so they are exalted.
5. Millions will live and die during the Millennium and they will be exalted.
6. Presidents Woodruff and Snow taught that most, if not all, will accept the gospel when it is taught to them in the spirit world. We are told to do their temple ordinances for them so they can be exalted. Why would Heavenly Father waste time and effort doing all those ordinances if the ordinance work won‘t be use to exalt his Children?
So that just leaves you and me, (we who are currently on earth) to be exalted. That is the next chapter!