年份

预测值/万吨

标准差

95%置信区间

2016

37.6606

0.4909

(36.6985,38.6226)

2017

39.6911

0.8868

(37.9529,41.4293)

2018

41.7217

1.3264

(39.1219,44.3214)

2019

43.7522

1.8117

(40.2013,47.3032)