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 |