'Year- to- date, Total Mail Volume is 7.5% or 2.7 billion pieces above SPLY. The most significant mail volume increase above SPLY for November FY 2005 YTD is in the lower revenue- per- piece Standard Mail category, which increased 2.0 billion pieces or 11.4%. YTD, First- Class Mail volume is 4.0% more than SPLY, generating $139 million or 2.3% more revenue than SPLY.
Total workhours for November, 2004 YTD are 2.4 million hours or 1.0% above SPLY. This increase in workhours is a reflection of the growth in mail volumes. YTD, the largest contributors to the workhours growth to SPLY were in City Delivery and Rural Delivery workhours. Combined, these operations were 3.5 million hours above SPLY.'
USPS web site