The French organic vegetables market is to show high growth in excess of 30 percent per annum in the coming years, providing lucrative opportunities to organic vegetable suppliers and exporters.   The new strategic study by Organic Monitor forecasts market revenues to treble between 2000 and 2004 as the penetration of organic vegetables increases in the retail sector. With a relatively slow increase in domestic organic vegetable production over the same period, exporters are tipped to capitalise on the high growth. Roughly a third of market volumes were imported in 2000 and this could reach 50 percent in 2001 due to the slow increase in domestic capacity.