Complex sentence: This loss of population has been attributed to taxes, political issues, and other factors, however, these numbers are only estimates and not the official census count, which is done every ten years at the start of the new decade.
Split into simpler sentences: This loss of population has been attributed to taxes, political issues, and other factors. However, it is not known if the region actually lost population as these numbers are only estimates and not the official census count, which is done every ten years at the start of the new decade.