| | | Jan. | Feb. | March | Apr. | May | June | July | Aug. | Sep. | Oct. | Nov. | Dec. |
|
| 1997 | | - | - | - | - | - | 851. 4 | 845. 4 | 842. 4 | 846. 4 | 835. 4 | 823. 4 | 799. 4 |
|
| 1998 | |
| 1999 | |
| 2000 | |
| 2001 | |
| 2002 | |
| 2003 | |
| 2004 | |
| 2005 | |
| 2006 | |
| 2007 | |
| 2008 | |
| 2009 | |
| 2010 | |
| 2011 | 3332. 5 | 3298. 5 | 3266. 5 | 3273. 5 | 3253. 5 | 3221. 5 | 3199. 5 | 3272. 5 | 3262. 5 | 3314. 5 | 3360. 5 | 3368. 5 |
|
| 2012 | |
| 2013 | |
| 2014 | |
| 2015 | |
| 2016 | |
| 2017 | |
| 2018 | 3947. 46 | 3952. 46 | 3973. 46 | 8065. 7 | 8138. 7 | 8075. 7 | 8126. 7 | 8138. 7 | 8102. 7 | 8118. 7 | 8113. 7 | 8195. 7 |
|
| 2019 | 9659. 4 | 9667. 4 | 9715. 4 | 9726. 4 | 9721. 4 | 9727. 4 | 9821. 4 | - | 9788. 4 | 9831. 4 | 9821. 4 | 9819. 4 |
|