16.8 The price of gasoline. The yearly average price of unleaded regular gasoline has fluctuated as follows:
| 1994: | $1.08 per gallon |
| 2004: | $1.85 per gallon |
| 2014: | $3.36 per gallon |
Give the gasoline price index numbers (2004 = 100) for 1994, 2004, and 2014.