Other data problems are illustrated in another section of the spreadsheet. Although not anywhere documented, it was deduced that units of recording of rainfall must have changed from inches to millimetres in 1981/82. The marks the last value in that year which was presumably entered in the old units. The column signifies a gap in the records in 1991/92.
marks the last value in that year which was presumably entered in the old units. The 
column signifies a gap in the records in 1991/92.
