Interval              MPECS Discovery Observations
2005-Q4                    0         0            4
2006-Q1                    1         0            0
2006-Q2                    0         0            0
2006-Q3                    0         0            0
2006-Q4                    0         0            0
2007-Q1                    0         0            0
2007-Q2                    0         0            0
2007-Q3                    0         0            0
2007-Q4                    2         0           16
2008-Q1                   10         0          129
2008-Q2                    1         0            4
2008-Q3                    9         0           73
2008-Q4                    1         0            8