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approximately $339 million, or 24 per cent of the total San Diego 

 County civilian payroll. From 1960 to 1967, the wholesale-retail 

 trade payroll increased 151 per cent, with the greatest increase 

 occurring between 1965 and 1967. Trade represents the second 

 largest civilian payroll category in San Diego County. 



Tourism 



The third largest industry in San Diego is tourism. Estimated 

 total visitor expenditures have increased approximately 50 per 

 cent between 1960 and 1967, with the sharpest rise occurring 

 during the 1965 to 1967 period. In addition to Bay clean-up, 

 opening of the San Diego Convention Center in 1965 undoubtedly 

 influenced this increase. 



In 1967, 446 conventions met in San Diego and contributed approxi- 

 mately $42.5 million to the area's economy. It has been estimated 

 that each delegate remained an average of 4.18 days and spent 

 about $35.50 per day. San Diego County's 1967 hotel-motel 

 occupancy rate of 75 per cent ranks among the highest in the 

 Nation. 



Education 



As previously mentioned, San Diego's public and private schools 

 employed 33,900 or 8.9 per cent of all civilian employed persons 



