Explain, using the information in Fig. 2.1, what has happened to the real price of domestic gas between 2008 and 2022.
Fig. 2.1: Index of CPI and domestic gas prices 2008–2022 (Base Year 2008 = 100)
| Year | Consumer Price Index (CPI) | Domestic Gas Bill Index | Average Gas Consumption Index |
|---|---|---|---|
| 2008 | 100.0 | 100.0 | 100.0 |
| 2010 | 105.2 | 108.0 | 98.4 |
| 2012 | 111.8 | 120.5 | 95.1 |
| 2014 | 115.4 | 132.0 | 91.8 |
| 2016 | 117.2 | 125.0 | 93.5 |
| 2018 | 123.6 | 135.2 | 90.2 |
| 2020 | 127.8 | 142.1 | 91.0 |
| 2022 | 141.2 | 194.5 | 86.5 |