Interval              MPECS Discovery Observations
1998                       1         0            3
1999                       0         0            0
2000                       4         0           39
2001                       1         0            2
2002                       0         0            0
2003                       3         0           37
2004                       0         0            0
2005                       0         0            0
2006                       0         0            0
2007                       2         0           32