Fig. 4From: Compositional data techniques for the analysis of the container traffic share in a multi-port regionCovariance Biplot. BALG-BAR-VAL traffic composition. The projection represents 100% of variance. The longitude of the rays is proportional to the variability of the clr.variable. Blue dots corresponds to the period 1976–1989 (before containerization boom), red dots correspond to the period 1990–2007 (before the crisis) and green dots correspond to the period 2008–2015Back to article page