Year

North slope

East Slope

South Slope

West Slope

1

2

4

1

1

2

4

3

3

4

3

6

6

7

13

4

7

8

15

12

5

6

10

27

13

6

8

15

32

13

7

3

21

43

13

8

7

24

56

13

9

8

25

67

15

10

7

36

74

16