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排名国家1998年产量(万吨 )构成比(% )比 1997年增减(% )比 1988年增减(% )比 1978年增减(% )排名国家1998年产量(万吨 )构成比(% )比 1997年增减(% )比 1988年增减(% )比 1978年增减(% )1美 国 2 377.0 17.90 .5 2 .313.114法 国 198.11.5 1.7- 0 .8- 13.02中 国 196 4.0 1
The composition ratio (%) of the 1998 production (ten thousand tons) of the ranking countries is higher than the increase (decrease) of 1997 (%) compared with that of 1988 (%), and the percentage of the country’s 1998 production (ten thousand tons) compared to 1978 (%). %) increase or decrease (%) compared to 1997 increase or decrease (%) than 1988 increase or decrease (%) 1 United States 2 377.0 17.90 .5 2 .313.114 France 198.11.5 1.7- 0 .8- 13.02 China 196 4.0 1