Recorded lock and bridge passages for the first ten months of the year.
Shannon hire trade 2003–2012
I’ve used the first ten months because so far I have 2012 figures for only the first ten months. In previous years, only once did the number of hire passages in November and December exceed 100, so the total for any year is not very different from that for ten months.
I would like to know why there has been such a long decline.
Irish waterways history 