| Countries | 2017 | 2018 | ||||
| Domestic sales | Exports | Exports as a proportion of domestic sales | Domestic sales | Exports | Exports as a proportion of domestic sales | |
| Japan | 523.42 | 470.58 | 89.91 | 527.21 | 481.75 | 91.38 |
| Korea | 156.02 | 263.24 | 168.72 | 155.23 | 244.97 | 157.80 |
| Germany | 381.1 | 437.35 | 114.76 | 343.6 | 399.05 | 116.14 |
| United States | 1758.38 | 303.75 | 17.27 | 1727.4 | 302.57 | 17.52 |
| China | 2912.25 | 106.38 | 3.65 | 2808.06 | 121.6 | 4.33 |