Marc Frank, NASDAQ

HAVANA, May 24 (Reuters) - Rainfall has shuttered all but a few of Cuba's 54 sugar mills, with output down nearly 40 percent to the lowest level in more than a century, which could force the island to import, official media and industry sources say.

While inclement weather played a big role in this season's disastrous performance, local experts and officials also blamed inadequate reforms and decapitalization, reflecting more broadly the socialist country's struggle to update its economy.