| year | geo | efficiency_rate |
|---|---|---|
| 1990 | EU28 | 50.6 |
| 1991 | EU28 | 45.9 |
| 1992 | EU28 | 49.0 |
| 1993 | EU28 | 49.2 |
| 1994 | EU28 | 48.8 |
| 1995 | EU28 | 46.1 |
| 1996 | EU28 | 48.4 |
| 1997 | EU28 | 49.0 |
| 1998 | EU28 | 48.8 |
| 1999 | EU28 | 50.3 |
| 2000 | EU28 | 55.7 |
| 2001 | EU28 | 56.7 |
| 2002 | EU28 | 56.1 |
| 2003 | EU28 | 57.1 |
| 2004 | EU28 | 58.3 |
| 2005 | EU28 | 60.2 |
| 2006 | EU28 | 57.6 |
| 2007 | EU28 | 56.3 |
| 2008 | EU28 | 57.4 |
| 2009 | EU28 | 57.6 |
| 2010 | EU28 | 58.2 |
| 2011 | EU28 | 56.7 |
| 2012 | EU28 | 55.2 |
| 1990 | EEA32 | 50.0 |
| 1991 | EEA32 | 45.4 |
| 1992 | EEA32 | 48.5 |
| 1993 | EEA32 | 48.5 |
| 1994 | EEA32 | 48.1 |
| 1995 | EEA32 | 45.4 |
| 1996 | EEA32 | 47.5 |
| 1997 | EEA32 | 48.0 |
| 1998 | EEA32 | 47.9 |
| 1999 | EEA32 | 49.5 |
| 2000 | EEA32 | 55.4 |
| 2001 | EEA32 | 56.4 |
| 2002 | EEA32 | 55.8 |
| 2003 | EEA32 | 56.7 |
| 2004 | EEA32 | 57.6 |
| 2005 | EEA32 | 59.7 |
| 2006 | EEA32 | 57.4 |
| 2007 | EEA32 | 56.1 |
| 2008 | EEA32 | 57.0 |
| 2009 | EEA32 | 57.1 |
| 2010 | EEA32 | 57.6 |
| 2011 | EEA32 | 56.1 |
| 2012 | EEA32 | 54.6 |
| 1990 | EU15 | 40.1 |
| 1991 | EU15 | 38.0 |
| 1992 | EU15 | 40.7 |
| 1993 | EU15 | 41.2 |
| 1994 | EU15 | 42.6 |
| 1995 | EU15 | 42.6 |
| 1996 | EU15 | 45.6 |
| 1997 | EU15 | 47.4 |
| 1998 | EU15 | 47.5 |
| 1999 | EU15 | 48.4 |
| 2000 | EU15 | 54.3 |
| 2001 | EU15 | 55.2 |
| 2002 | EU15 | 54.8 |
| 2003 | EU15 | 55.7 |
| 2004 | EU15 | 57.6 |
| 2005 | EU15 | 59.5 |
| 2006 | EU15 | 56.6 |
| 2007 | EU15 | 55.5 |
| 2008 | EU15 | 57.2 |
| 2009 | EU15 | 57.0 |
| 2010 | EU15 | 57.5 |
| 2011 | EU15 | 56.0 |
| 2012 | EU15 | 54.5 |