Tabla elaborada con los datos facilitados por la Agencia Tributaria.
| Año | Coeficiente Max: | % | Coeficiente Min: | % |
| 2011 | 1 | 0.00% | 1 | 0.00% |
| 2010 | 1 | 0.00% | 1 | 0.00% |
| 2009 | 1 | 0.00% | 1 | 0.00% |
| 2008 | 1 | 0.00% | 1 | 0.00% |
| 2007 | 1 | 0.00% | 1 | 0.00% |
| 2006 | 1 | 0.00% | 1 | 0.00% |
| 2005 | 1 | 0.00% | 1 | 0.00% |
| 2004 | 1 | 0.00% | 1 | 0.00% |
| 2003 | 1 | 0.00% | 1 | 0.00% |
| 2002 | 1 | 0.00% | 1 | 0.00% |
| 2001 | 1 | 0.00% | 1 | 0.00% |
| 2000 | 1 | 0.00% | 1 | 0.00% |
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