Statistics by the workplace: UMBEF
| Year of reporting | Count |
|---|---|
| 1987 | 1 |
| 1989 | 2 |
| 1990 | 1 |
| 1992 | 3 |
| 1993 | 2 |
| 1994 | 90 |
| 1995 | 157 |
| 1996 | 151 |
| 1997 | 294 |
| 1998 | 321 |
| 1999 | 336 |
| 2000 | 424 |
| 2001 | 346 |
| 2002 | 307 |
| 2003 | 313 |
| 2004 | 463 |
| 2005 | 530 |
| 2006 | 287 |
| 2007 | 528 |
| 2008 | 468 |
| 2009 | 466 |
| 2010 | 708 |
| 2011 | 593 |
| 2012 | 532 |
| 2013 | 573 |
| 2014 | 584 |
| 2015 | 493 |
| 2016 | 522 |
| 2017 | 511 |
| 2018 | 474 |
| 2019 | 317 |
| 2020 | 329 |
| 2021 | 301 |
| 2022 | 261 |
| 2023 | 268 |
| 2024 | 78 |
| . | 1 |