The wave parameter joint distribution tables display counts of wave records for
each cell defined by the cut-offs in the top row (either peak period Tp, or peak direction Dp) and
first column (either significant wave height Hs, or Dp). We produce 3 tables,
1) Hs vs Tp, 2) Dp vs Tp and 3) Hs vs Dp.
The top row Tp labels correspond to the following cut-off intervals
where "[" indicates greater than or equal to and ")" indicates strictly
less than:
