in groups that were measured by the U.S. Census Bureau, the largest groups, based on the total population, were:  Irish  (6.6%);  German  (6.5%);  Polish  (5.8%);  Italian  (3.4%);  English  (1.98%);  Sub-Saharan African  (1.2%);  American (1.1%);  Russian  (0.97%);  Swedish  (0.91%);  French (except Basque)  (0.85%);  Arab  (0.68%);  Greek  (0.63%);  Dutch  (0.53%);  Norwegian  (0.52%);  Scottish