Numbers

By Melissa August, Val Castronovo, Rachel Dry, Julie Grace, Ellin Martens, Benjamin Nugent, Michele Orecklin, Julie Rawe, Amanda Ripley, Josh Tyrangiel

66% Regional Red Cross offices with less than a day and a half's supply of blood

25,000 Number of donors needed daily to end the national blood shortage and bring supplies up to the optimal three-day level

$448.20 Average amount teachers spent of their own money on classroom items last year

$75 Amount per teacher that Portland, Ore., started allocating this year for out-of-pocket expenses

8.6% More energy derived from burning a pound of No. 6 fuel oil than from burning a like amount of pig lard, which emits 65% less nitrous oxide

1.8 billion Pounds of pig lard that will be produced in the U.S. this year

169,246 Number of votes cast online last week for which hairdo a bride should wear at her wedding, which will be broadcast live this week on Today

108,238 Number of votes cast in the Wyoming primary last month

Sources: American Red Cross; Wall Street Journal; Pennsylvania State University, National Pork Producers Council; Today, www.state.wy.us.