Add 3.931m to data values 1963-1970 to refer to RLR<br>Add 3.916m to data values 1971-1977 to refer to RLR<br>Add 3.912m to data values 1978-1986 to refer to RLR<br>Add 3.898m to data values 1987-1993 to refer to RLR<br>Add 3.905m to data values 1994 onwards to refer to RLR<br>RLR is 10.000m below primary benchmark BM Hirosima