| year | geo | efficiency_rate |
|---|---|---|
| 1990 | EEA33 | 42.0 |
| 1991 | EEA33 | 42.5 |
| 1992 | EEA33 | 42.9 |
| 1993 | EEA33 | 43.5 |
| 1994 | EEA33 | 43.7 |
| 1995 | EEA33 | 43.8 |
| 1996 | EEA33 | 44.2 |
| 1997 | EEA33 | 44.7 |
| 1998 | EEA33 | 45.2 |
| 1999 | EEA33 | 45.2 |
| 2000 | EEA33 | 45.3 |
| 2001 | EEA33 | 45.4 |
| 2002 | EEA33 | 45.6 |
| 2003 | EEA33 | 46.0 |
| 2004 | EEA33 | 47.0 |
| 2005 | EEA33 | 47.2 |
| 2006 | EEA33 | 47.0 |
| 2007 | EEA33 | 46.9 |
| 2008 | EEA33 | 47.7 |
| 2009 | EEA33 | 48.0 |
| 2010 | EEA33 | 48.6 |
| 2011 | EEA33 | 48.1 |
| 2012 | EEA33 | 47.2 |
| 2013 | EEA33 | 47.5 |
| 2014 | EEA33 | 47.0 |
| 2015 | EEA33 | 47.5 |
| 2016 | EEA33 | 48.6 |
| 1990 | EU28 | 42.2 |
| 1991 | EU28 | 42.6 |
| 1992 | EU28 | 43.1 |
| 1993 | EU28 | 43.8 |
| 1994 | EU28 | 44.0 |
| 1995 | EU28 | 44.0 |
| 1996 | EU28 | 44.6 |
| 1997 | EU28 | 45.0 |
| 1998 | EU28 | 45.6 |
| 1999 | EU28 | 45.6 |
| 2000 | EU28 | 45.7 |
| 2001 | EU28 | 45.8 |
| 2002 | EU28 | 45.8 |
| 2003 | EU28 | 46.2 |
| 2004 | EU28 | 47.2 |
| 2005 | EU28 | 47.2 |
| 2006 | EU28 | 47.1 |
| 2007 | EU28 | 47.2 |
| 2008 | EU28 | 48.0 |
| 2009 | EU28 | 48.4 |
| 2010 | EU28 | 49.1 |
| 2011 | EU28 | 48.7 |
| 2012 | EU28 | 47.6 |
| 2013 | EU28 | 47.9 |
| 2014 | EU28 | 47.4 |
| 2015 | EU28 | 48.3 |
| 2016 | EU28 | 49.7 |