Table 3.

Descriptive statistics of the differences between phases 1 and 2 and phases 3 and 4

	Difference in flow 150 (%)
	Before decongestion		After decongestion
	Phase 1–2	Phase 3–4	Phase 1–2	Phase 3–4
Arithmetic mean	15.6	−30.0	13.4	−28.7
Median	9.1	−17.2	7.2	−17.3
Standard deviation	22.5	38.0	20.2	32.6
Skewness	1.2	−1.9	1.4	−1.9
Minimum	−31.5	−217.9	−26.6	−179.4
Maximum	99.2	34.4	91.4	15.5
Number	18,129	17,489	15,118	14,605