First, the time series of recruitment for each stock is shown, using the boom/bust/average classification. Then, common boom/bust years are identified and visualized on the same PCA of the 14 predictor time series.

Synchrony

Years where 1/3 or more of the stocks had boom recruitment.
Year Average Boom Bust
1999 12 9 0
2000 13 8 0
2008 8 12 1
2009 11 8 2
2010 11 10 0
2012 15 6 0
2013 14 7 0
Years where 1/3 or more of the stocks had bust recruitment.
Year Average Boom Bust
1978 9 2 6
2003 13 1 7
2004 15 0 6
2005 10 1 10
2006 10 4 7
2017 10 3 6
2018 5 1 7

PCA showing common boom/bust years