Average

N

Standard Deviation

Always

8.48

294

2.063

Over five years

8.63

43

1.169

For five years

7.76

171

1.614

For three years

6,75

56

2.271

For a year

6.43

22

2.366

Over five years

8.63

43

1.169

DK/NA

5.05

39

2.455

Total

7.85

625

2.171