Inflation as measured by the consumer price index reflects the annual percentage change in the cost to the average consumer of acquiring a basket of goods and services that may be fixed or changed at specified intervals, such as yearly. The Laspeyres formula is generally used.
消費者物価指数（CPI） (%)
| 1970 | 1990 | 2000 | 2005 | 2010 | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
| オランダ | 3.7 | 2.5 | 2.4 | 1.7 | 1.3 | 2.3 | 2.5 | 2.5 | 1.0 | 0.6 | 0.3 | 1.4 | 1.7 | 2.6 | 1.3 | 2.7 | 10.0 | 3.8 | 3.3 |
| ベルギー | 3.9 | 3.4 | 2.5 | 2.8 | 2.2 | 3.5 | 2.8 | 1.1 | 0.3 | 0.6 | 2.0 | 2.1 | 2.1 | 1.4 | 0.7 | 2.4 | 9.6 | 4.0 | 3.1 |
| ルクセンブルク | 4.6 | 3.3 | 3.2 | 2.5 | 2.3 | 3.4 | 2.7 | 1.7 | 0.6 | 0.5 | 0.3 | 1.7 | 1.5 | 1.7 | 0.8 | 2.5 | 6.3 | 3.7 | 2.1 |