| Variable | Year 1 | Year 2 |
|---|---|---|
| Average Monthly Household Income | £3,200 | £3,600 |
| Quantity Demanded of 'Budget-Line' Canned Sardines (units) | 15,000 | 12,000 |
Using the data in Table 1, explain whether 'Budget-Line' canned sardines are a normal good or an inferior good.