NASD,Total,100.00%,27.52%,33.49%,38.99%
NASD,UBSS,60.09%,90.00%,52.05%,45.88%
NASD,ARCA,24.31%,6.67%,32.88%,29.41%
NASD,DMAU,8.72%,0.00%,6.85%,16.47%
NASD,Principal,5.50%,3.33%,6.85%,5.88%
NASD,NITE,0.92%,0.00%,0.00%,2.35%
NASD,,0.46%,0.00%,1.37%,0.00%
NYSE,Total,100.00%,43.90%,17.07%,39.02%
NYSE,UBSS,89.02%,88.89%,85.71%,90.63%
NYSE,ARCA,10.98%,11.11%,14.29%,9.38%
AMEX,Total,100.00%,22.22%,43.86%,33.92%
AMEX,UBSS,69.59%,84.21%,57.33%,75.86%
AMEX,ARCA,10.53%,5.26%,8.00%,17.24%
AMEX,Principal,9.94%,10.53%,16.00%,1.72%
AMEX,,9.94%,0.00%,18.67%,5.17%