Of the three, Oregon has the lowest number, averaging 3 tornadoes per year. Next up comes Pennsylvania, averaging 17 tornadoes per year. Highest of the three is Illinois, averaging 53 tornadoes per year.

Texas, averaging about 150 tornadoes per year.

Variable by site, averaging 320ml/year.

There isn't a suffix for ten because there is no base/ root word.

Except for special situations, like Farm income, income averaging isn't available anymore. The most you can do is try to manage the year the income is considered earned in.