Tier 1 Capital Ratio Over Time
Tier 1 Capital Ratio Northern Trust Bank, National Association All Insured Commercial Banks in Arizona
09-30-2006 10.46 16.655
06-30-2006 10.46 17.88
03-31-2006 11 12.81
12-31-2005 11.07 13.511
09-30-2005 11.86 13.976
06-30-2005 12.23 13.12
03-31-2005 12.62 14.433
12-31-2004 12.3 14.086
09-30-2004 12.71 16.414
06-30-2004 12.44 17.681
03-31-2004 12.56 20.199
12-31-2003 12.1 18.678
09-30-2003 12.07 20.564
06-30-2003 11.42 20.436
03-31-2003 11.99 26.858
12-31-2002 11.53 28.489