exhibit 12
LMI Tract LMI Tract LMI Tract total LMI total LMI total LMI
Year top 25 large small top 25 large small
1990 12.56 10.27 8.32 21.70 22.32 21.54
1991 10.06 8.55 7.31 21.04 20.97 20.57
1992 8.80 7.64 7.70 20.00 19.02 20.98
1993 8.43 7.50 7.63 22.57 21.55 21.23
1994 10.39 9.10 9.39 27.33 26.12 26.01
1995 10.15 9.46 9.81 26.31 25.71 26.05
1996 9.52 9.26 9.54 26.07 25.77 26.27
1997 9.43 9.51 10.24 25.47 26.56 28.35
1998 8.73 8.49 8.68 24.58 24.50 25.34
1999 10.80 10.75 9.80 29.40 30.73 29.04
2000 12.80 12.26 11.39 32.82 32.43 31.62
2001 10.51 10.24 9.24 27.91 28.00 28.04
2002 9.72 9.68 9.14 27.16 28.01 28.79
2003 11.23 11.55 9.19 26.64 29.29 29.26
2004 15.56 15.63 14.27 33.27 34.56 38.19
2005 16.34 16.85 14.74 32.74 34.05 37.53
2006 17.66 18.23 15.89 33.54 35.30 37.91
2007 17.48 16.39 15.90 32.97 33.89 36.29