=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 19-Oct-1993
Haikou              610/007 RLR(1990) is 9.7m below BM
=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 18-Jan-2012
Using data from the latest UHSLC JASL cd data values for 1995-1997 have been
added to the 'METRIC' dataset. Where the previous data and the Hawaii data
overlap the data values are close but not identical.