| Month | Year | Condition | Price | |
 | Mar | 1991 | Very Good | $4.10 |
 | Apr | 1991 | Fine | $5.13 |
 | Apr | 1991 | Very Good | $4.12 |
 | Apr | 1991 | Very Good | $4.12 |
 | Apr | 1991 | Good | $2.09 |
 | May | 1991 | Very Good | $4.00 |
 | May | 1991 | Fine | $5.15 |
 | May | 1991 | Very Good | $4.00 |
 | Jun | 1991 | Fine | $5.20 |
 | Jun | 1991 | Very Good | $4.06 |
 | Jun | 1991 | Fine | $5.20 |
 | Jul | 1991 | Very Good | $4.09 |
 | Jul | 1991 | Very Good | $4.09 |
 | Jul | 1991 | Very Good | $4.09 |
 | Aug | 1991 | Very Good | $4.07 |
 | Aug | 1991 | Fine | $5.01 |
 | Sep | 1991 | Very Good | $4.15 |
 | Oct | 1991 | Fine | $5.18 |
 | Oct | 1991 | Very Good | $4.02 |
 | Nov | 1991 | Very Good | $4.01 |