If 'For example, the first number in Column (10) shows that in FY 1997, the volume of mail sent by households to other households represented 6.6 percent of total First-Class volume.' is true, does it logically mean that 'Mail sent between households make up 6.6 percent of the total First-Class volume.' also is?
For example, the first number in Column (10) shows that in FY 1997, the volume of mail sent by households to other households represented 6.6 percent of total First-Class volume.###Mail sent between households make up 6.6 percent of the total First-Class volume.