| | | | | | | 2018 1 3 | | | | | | | | | | 2017 15 | | | | | | | CPI | 3% CPI | 6% | | | | | | | | | | | | | | | = | x | | = | x | | | | | 30 | 30 30 | 15 15 | 15 | | | | | | | | | | | | | | | | | | | | | 20 | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |