1. (2023·天河二模) 下表是《广州茶叶输出量及占全国茶叶出口比重表》（单位：万担）。表中变化是因为中国（ ）                                                                                                                                                                                

年份	1843	1844	1852	1863	1882
出口量	13.3	51.9	27	13	13.4
比重	几乎100%	98.4%	38.3%	23%	6.6%