| 1月 |
2月 |
3月 |
4月 |
5月 |
6月 |
7月 |
8月 |
9月 |
10月 |
11月 |
12月 |
|
| 1999 |
34.03 |
33.5 |
34.3 |
34.39 |
35.3 |
45.37 |
43.93 |
43.89 |
42.52 |
40.84 |
40.09 |
38.14 |
| 2000 |
42.82 |
47.99 |
49.92 |
51.13 |
54.02 |
55.22 |
58.21 |
58.13 |
54.83 |
56.31 |
59.89 |
59.14 |
| 2001 |
59.39 |
56.82 |
60.88 |
60.99 |
55.92 |
56.55 |
49.26 |
42.14 |
40.61 |
38.84 |
40.08 |
37.59 |
| 2002 |
34.31 |
35.11 |
37.16 |
39.08 |
38.75 |
44.47 |
42.4 |
43.02 |
40.4 |
38.23 |
36.46 |
34.5 |
| 2003 |
37.92 |
38.2 |
38.2 |
38.53 |
38.28 |
36.11 |
35.78 |
34.37 |
32.97 |
32.51 |
34 |
36.64 |
| 2004 |
38.91 |
40.89 |
42.49 |
38.95 |
28.73 |
26.65 |
26.49 |
25.68 |
26.75 |
25.34 |
25.69 |
24.29 |
| 2005 |
22.87 |
24.99 |
22.63 |
22.28 |
15.66 |
15.98 |
16.05 |
16.92 |
16.78 |
15.72 |
15.63 |
16.38 |
| 2006 |
17.61 |
17.72 |
19.42 |
19.69 |
19.91 |
20.03 |
20.38 |
21.41 |
22.86 |
26.13 |
33.38 |
|
| 2007 |
38.36 |
39.62 |
44.36 |
53.33 |
43.42 |
42.74 |
50.59 |
59.24 |
63.74 |
69.64 |
53.79 |
59.24 |
| 2008 |
49.4 |
49.21 |
39.45 |
42.06 |
25.89 |
20.64 |
20.93 |
18.13 |
18.68 |
14.09 |
15.23 |
14.86 |