Interval              MPECS Discovery Observations
2003-Q4                    3         0           14
2004-Q1                    0         0            0
2004-Q2                    0         0            0
2004-Q3                    0         0            0
2004-Q4                    0         0            0
2005-Q1                    0         0            0
2005-Q2                    0         0            0
2005-Q3                    0         0            0
2005-Q4                    0         0            0
2006-Q1                    0         0            0
2006-Q2                    0         0            0
2006-Q3                    0         0            0
2006-Q4                    1         0            3
2007-Q1                    0         0            0
2007-Q2                    0         0            0
2007-Q3                    0         0            0
2007-Q4                    1         0            3