Table 1. Top 10 country-level trade shocks for wheat, from 1986 to 2011.

The table reports the volume (ΔE_j(τ) in 10⁶ tonnes) and shares of reduction, the period of each crisis, the global variation (ΔE^w), and the ranking of the critical exporter j before (t₀) and after (t₁) the shock. The index Θ_j(τ) refers to Eq (2).

Country	ΔEj(τ)	$\frac{\Delta E_j\left(\tau \right)}{E_j\left(t_0\right)}$%	Years	ΔEw(τ)	Θj(τ)	Ranking t0 → t1
USA	-14.9	-36.32	1988 - 1990	-12.7	-1.17	1 → 1
Canada	-11.7	-50.22	1987 - 1989	-6.3	-1.83	2 → 3
USA	-10.6	-33.02	2007 - 2009	21.6	0.49	1 → 1
USA	-8.9	-28.69	2004 - 2006	5.1	1.77	1 → 1
Ukraine	-8.8	-68.57	2009 - 2011	2.3	3.76	6 → 8
Australia	-8.5	-55.66	2006 - 2007	1.6	5.23	4 → 6
Australia	-8.4	-47.34	2000 - 2003	-5.2	-1.62	4 → 4
Australia	-7.3	-44.88	1986 - 1988	19.2	0.38	3 → 4
Canada	-7.1	-37.83	2000 - 2003	-5.2	-1.36	2 → 3
Ukraine	-6.9	-80.12	2002 - 2003	-11.1	-0.63	7 → 12