NAPA (CBS SF) – California wineries are feeling the effects of the trade war between the U.S. and China.

Chinese leaders imposed retaliatory tariffs on American goods last April.

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That has significantly reduced sales from California vintners in China, the world’s fastest-growing wine market.

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A report this month from the Wine Institute in San Francisco found U.S. wine exports to China fell nearly 25-percent last year.

Wine exports as a whole fell nearly five-percent to their lowest levels since 2012.

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California wines make up 90-percent of u-s wine exports by volume.