In BPLE the standardised CPUE index increased from 1995/96 to 2000/01, then fluctuated without trend, and in 2020/21 was about twice the value in 1995/96. For ENHG the index had peaks in 2004/05 and 2015/16, and in 2020/21 was 81% of the value in 1995/96. For WCNI the standardised index increased in an irregular manner since 1995/96, and in 2020/21 was 27% more than at the start of the series.
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