16 Here the total of hospitalization expenses and outpatient expenses is defined as medical expenses and it is necessary to bear in mind the point that dental treatment and pharmacy drug expenses, etc. are not included in the definition. However, it is thought that on the whole trends of national medical expenses can be understood. And it is also necessary to bear in mind the point that the provisional calculation here makes the simplifying assumption that there is no impact from macro economy trends such as the inflation rate, etc.