Open Access
Table 4.
Annual Average of the daily K-index sum (GOP).
| No | Year | Annual average of the daily K-index sum (GOP) |
|---|---|---|
| 1 | 1989 | 19.58 |
| 2 | 1990 | 18.27 |
| 3 | 1991 | 20.14 |
| 4 | 1992 | 18.91 |
| 5 | 1993 | 17.33 |
| 6 | 1994 | 17.68 |
| 7 | 1995 | 14.75 |
| 8 | 1996 | 14.63 |
| 9 | 1997 | 13.11 |
| 10 | 1998 | 15.39 |
| 11 | 1999 | 16.94 |
| 12 | 2000 | 18.59 |
| 13 | 2001 | 17.32 |
| 14 | 2002 | 17.47 |
| 15 | 2003 | 21.98 |
| 16 | 2004 | 16.88 |
| 17 | 2005 | 17.07 |
| 18 | 2006 | 14.24 |
| 19 | 2007 | 13.26 |
| 20 | 2008 | 13.12 |
| 21 | 2009 | 10.64 |
| 22 | 2010 | 12.52 |
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