annual, five-year, monthly, etc.
national
The national average is just over two children per family.

overall
career, lifetime (esp. AmE)
moving, weighted (both technical)
batting, bowling, scoring, slugging (AmE)
grade, grade point (both AmE)
the student with the best grade point average in his class

arrive at, calculate, compute, find, work out
You'll have to calculate the average.

exceed

above average, below average
His test results are well above average.
an above-average climb in prices

on average
On average, prices have risen 6%.

Average is used with these nouns as the subject:
inflation, unemployment

Average is used with these nouns as the object:
point, return

Average is used with these nouns:
ability, attendance, bloke, build, citizen, consumer, consumption, cost, density, distance, duration, earnings, expenditure, family, fare, height, household, income, increase, individual, intake, intelligence, investor, length, margin, mark, mileage, number, output, pay, percentage, person, player, price, profit, proportion, quantity, rainfall, rate, return, salary, score, sentence, shopper, size, snowfall, speed, sum, temperature, value, velocity, viewer, wage, weight, woman, worker