Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| First issued | Design | Slogan | Serial format | Serials issued | Notes |
| --- | --- | --- | --- | --- | --- |
| 1955 | White embossed digits with white border on black background; ARIZONA and last two digits of registration year embossed in white and centered at top between screw holes | "GRAND CANYON STATE" embossed in white and centered at bottom | A-12345 |  | Coded by county of issuance. |
| 1958 | White embossed digits with white border on blue background; ARIZONA and last two digits of registration year embossed in white and centered at top between screw holes | GRAND CANYON STATE embossed in white and centered at bottom | ABC-123 | AAA-001 to BZZ-999 |  |
| 1960 | Blue embossed digits with blue border on white background; ARIZONA and last two digits of registration year embossed in blue and centered at top between screw holes | GRAND CANYON STATE embossed in blue and centered at bottom | ABC-123 | CAA-001 to DZZ-999 |  |
| 1963 | White embossed digits with white border on blue background; ARIZONA and last two digits of registration year embossed in white and centered at top between screw holes | GRAND CANYON STATE embossed in white and centered at bottom | ABC-123 | EAA-001 to FZZ-999 |  |
| 1965 | Black embossed digits with black border on white background; ARIZONA and last two digits of registration year embossed in black and centered at top between screw holes | GRAND CANYON STATE embossed in black and centered at bottom | ABC-123 | HAA-001 to JZZ-999 |  |
| 1968 | Black embossed digits with black border on yellow background; ARIZONA and last two digits of registration year embossed in black and centered at top between screw holes | GRAND CANYON STATE embossed in black and centered at bottom | ABC-123 | KAA-001 to NZZ-999 |  |
| 1972 | Green embossed digits with green border on pale orange background; ARIZONA and last two digits of registration year embossed in green and centered at top between screw holes | GRAND CANYON STATE embossed in green and centered at bottom | ABC-123 | PAA-001 to WZZ-999 |  |
| 1980 | White embossed digits with white embossed border on maroon background, with white embossed saguaro cactus dividing the letters and numbers; ARIZONA embossed in white and centered at top | GRAND CANYON STATE embossed in white and centered at bottom | ABC-123 | AAA-001 to NZZ-999 |  |
| 1996 | Dark green embossed digits on screened background of purple mountains and cacti with white setting sun and sky fading from orange to white to turquoise at top; ARIZONA in wide plain dark green letters outlined in white and centered at top | GRAND CANYON STATE in dark green thin plain letters at bottom right in orange part of screen | 123·ABC | 101·AAA to 999·ZZZ | Awarded "Plate of the Year" for best new license plate of 1996 by the Automobile License Plate Collectors Association, the first time Arizona has been so honored. |
| 2008 | Dark green screened digits on screened background of purple mountains and cacti with white setting sun and sky fading from orange to white to turquoise at top; ARIZONA in wide plain dark green letters outlined in white and centered at top; security stripe through center of plate | GRAND CANYON STATE in dark green thin plain letters at bottom right in orange part of screen | ABC1234 | AAA0001 to present |  |
Question:
what is the average serial format of the arizona license plates?
Answer:
ABC-123