Interval              MPECS Discovery Observations
2002                       3         0           16
2003                       4         0           12
2004                       6         0           26
2005                      17         0           63
2006                       0         0            0
2007                       0         0            0
2008                       1         0            3
2009                       0         0            0
2010                       8         0           25
2011                       2         0            4
2012                       3         0           11