|
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|
|
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|
|
|
||||||||||||
|
1997 |
1998 |
1999 |
2000 |
2001 |
2002 |
1997 |
1998 |
1999 |
2000 |
2001 |
2002 |
||
|
Mean
|
21.3 |
20.7 |
20.9 |
20.3 |
20.8 |
20.1 |
Mean
|
985 |
952 |
1018 |
955 |
957 |
908 |
|
25th Percentile
|
19.0 |
18.0 |
18.0 |
17.3 |
18.0 |
17.0 |
25th Percentile
|
880 |
838 |
880 |
830 |
848 |
800 |
|
50th Percentile
|
21.0 |
20.0 |
20.0 |
20.0 |
20.0 |
19.0 |
50th Percentile
|
990 |
910 |
1015 |
960 |
940 |
900 |
|
75th Percentile
|
23.0 |
23.0 |
23.0 |
23.0 |
23.5 |
22.0 |
75th Percentile
|
1070 |
1073 |
1118 |
1020 |
1050 |
1050 |
|
N
|
87 |
92 |
95 |
101 |
157 |
198 |
N |
59 |
55 |
57 |
54 |
103 |
120 |