Your cholesterol levels tend to rise as you get older.
On average, house values rose 33 percent last year, and prices tended to rise across the board.
The hot air over the land tends to rise, creating an area of low pressure.
But with the most serious cases, all those numbers tend to rise, and some people might even cost more on their own.
The seriousness of the disease tends to rise with age.
Health care costs tend to rise over time as new technology and procedures are introduced.
But taxes went up, because market values tended to rise significantly in the early 1990's.
Tuition as of 2010 is $9,250 and tends to rise each year.
And cholesterol levels tend to rise as people get older, although no one knows why.
But value stocks tend to rise when interest rates go up.