Population Pyramid:

In Portland,Oregon  there are more males between the ages of 0-39 years old than females. There are more females between the ages of 40-85+years old then males. A prediction may be from what we see that, there are more males being born in Oregon. The fact that there are more in later years which let us assume that females can take care of themselves better and they maintain a healthier lifestyle than the males can  which benefits them and gives them a longer life.