The total amount of DogeCoin will increase each year. However, the maximum amount generated per year is 5.2 billion. This means that the inflation rate will decreases each year.

The total number of coins will continue to increase but the amount generated per year will always be the same. For example.

(5 divided by 100 = 5%) next year... (5 divided by 105 = 4.7%) next next year (5 divided by 110 = 4.5%)

Because you are adding a fixed amount to an ever increasing total amount, the inflation rate decreases each and every year.

To take it further, imagine when adding the 5 billion new coins barely increases the total supply by a fraction of a percent. In this situation, we would start to see the value of each doge increase as the supply being added per year becomes negligible when compared with the lump sum of doge already in existence.