Go West, Manteca breadwinner, go West.The clarion call of bigger paychecks on the other side of the Altamont Pass accelerated during the first decade of the 21st century as the ranks of San Joaquin County residents commuting out rose 32 percent.While commuters also went north, south and east the lion’s share headed west. Nearly 6 out of every 10 residents who looked beyond county borders for work or better paychecks headed to the Bay Area. Altogether, 106,200 commuters are either headed out or into San Joaquin County to work on a typical weekday.Those tidbits are part of a snapshot of San Joaquin County commuting provided in a regional analyst by the University of the Pacific’s Eberhardt School of Business Forecasting Center.