Jahr  MPECS Discovery Observations
1993      0         0            0
1994      0         0            0
1995      0         0            0
1996      0         0            0
1997      0         0            0
1998      0         0            0
1999      0         0            0
2000      0         0            0
2001      0         0            0
2002      0         0            0
2003      0         0            0
2004      0         0            0
2005      0         0            0
2006      0         0            0
2007      0         0            0
2008      5         1           21
2009      3         0          218
2010      1         0            2
2011      3         0           14
2012      3         0           26
2013      3         0           22
2014      0         0            0
2015      0         0            0
2016      1         0            3
2017      5         0           17
2018     12         0           65
2019     12         2          154
2020     14         2          305
2021      1         0            6