Βάση εισαγωγής γενικής κατηγορίας
| 1991 | 5232 | 16.4 |
| 1992 | 5440 | 17.0 |
| 1993 | 5275 | 16.5 |
| 1994 | 5731 | 17.9 |
| 1995 | 5660 | 17.7 |
| 1996 | 5596 | 17.5 |
| 1997 | 5538 | 17.3 |
| 1998 | 5436 | 17.0 |
| 1999 | 5527 | 17.3 |
| 2000 | 19520 | 19.5 |
| 2001 | 19165 | 19.2 |
| 2002 | 18907 | 18.9 |
| 2003 | 18953 | 19.0 |
| 2004 | 19077 | 19.1 |
| 2005 | 18929 | 18.9 |
| 2006 | 18971 | 19.0 |
| 2007 | 18980 | 19.0 |
| 2008 | 19089 | 19.1 |
| 2009 | 19306 | 19.3 |
| 2010 | 19234 | 19.2 |
| 2011 | 18917 | 18.9 |
| 2012 | 18914 | 18.9 |
| 2013 | 18471 | 18.5 |
| 2014 | 19072 | 19.1 |
| 2015 | 18540 | 18.5 |
| 2016 | 18628 | 18.6 |
| 2017 | 18416 | 18.4 |
| 2018 | 18240 | 18.2 |
| 2019 | 18314 | 18.3 |
| 2020 | 17975 | 18.0 |
| 2021 | 18487 | 18.5 |
| 2022 | 18470 | 18.5 |
| 2023 | 18820 | 18.8 |
| 2024 | 18490 | 18.5 |