Add 4.086m to data values 1958-1971 to refer to RLR<br>Add 4.082m to data values 1972-1980 to refer to RLR<br>Add 4.085m to data values 1981-1984 to refer to RLR<br>Add 4.080m to data values 1985-1988 to refer to RLR<br>Add 4.082m to data values 1989-1993 to refer to RLR<br>Add 4.085m to data values 1994 onwards to refer to RLR<br>RLR is 10.250m below primary benchmark BM Mozi (i)