Table 4.
Characteristics of ties evolution
| Year | Density (%) | Number of ties | Average degree |
|---|---|---|---|
| 2003 | 11 | 131 | 3.743 |
| 2004 | 10.2 | 121 | 3.457 |
| 2005 | 11.2 | 133 | 3.800 |
| 2006 | 9.5 | 113 | 3.229 |
| 2007 | 11.5 | 137 | 3.914 |
| 2008 | 12.2 | 145 | 4.143 |
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