Year

Price (NTD/ton)

Stock (tons)

Inventory amount (NTD million)

Change in inventory (NTD million)

2011

21,603

614,376

13,272

3953

2012

23,098

735,889

16,998

3726

2013

22,174

907,256

20,118

3120

2014

24,025

900,008

21,622

1505

2015

23,079

790,812

18,251

−3371

2016

23,905

758,770

18,138

−113

2017

23,640

864,260

20,431

2292

2018

21,980

988,561

21,728

1297

2019

21,660

1,101,509

23,858

2130