Add 5.279m to data values 1965-1976 to refer to RLR<br>Add 5.270m to data values 1977-1980 to refer to RLR<br>Add 5.265m to data values 1981-1985 to refer to RLR<br>Add 5.275m to data values 1986-1992 to refer to RLR<br>Add 5.266m to data values 1993 onwards to refer to RLR<br>RLR is 9.500m below primary benchmark BM Hakata