NASD,Total,100.00%,80.55%,11.78%,7.68%
NASD,Principal,98.53%,98.50%,98.76%,98.47%
NYSE,Total,100.00%,88.05%,6.50%,5.45%
NYSE,Principal,98.35%,98.50%,96.39%,98.18%
AMEX,Total,100.00%,74.13%,17.30%,8.58%
AMEX,Principal,96.07%,95.19%,98.43%,98.94%