The column headers are:

Year
Description: fishery season year
Unit:
Type: discrete
Range: 1997 to 2025
Note:

Forms issued
Description: number of forms issued
Unit:
Type: continuous
Range: 1856 to 2170
Note:

Data returns
Description: number of forms returned with catch or effort data
Unit:
Type: continuous
Range: 876 to 1081
Note: data returns include returns with catch or net effort.

Nil returns
Description: number of forms returned with no catch or effort data
Unit:
Type: continuous
Range: 677 to 1149
Note: nil returns include returns with no catch or net effort.

Data and nil returns
Description: total number of forms returned
Unit:
Type: continuous
Range: 1758 to 2041
Note: forms returned are those with catches and those with no catches

Return rate %
Description: forms returned as percentage of forms issued
Unit: %
Type: continuous
Range: 92 to 96
Note: forms returned are those with catches and those with no catches

Rod effort return rate %
Description: returns with rod effort information as a percentage of rod forms returned
Unit: %
Type: continuous
Range: blank, 87 to 97
Note: rod forms returned are those reporting catch and those not reporting catch. Returns with rod effort information include those which reported that no salmon fishing took place. Salmon rod effort is published from 2023. Cells are blank for seasons 1997 to 2022.

Percentage of slamon catch covered by effort
Description: percentage of the total salmon rod catch that had salmon rod effort included in the return.
Unit: %
Type: continuous
Range: blank, 89 to 99
Note: total salmon rod catch include retained and released multi sea-winter and one sea-winter salmon. Salmon rod effort information is published from 2023. Cells are blank for seasons 1997 to 2022.