This graph takes from Apulia, Italy about Agriculture workers from a tomato field.
On April,2019 to Aug 2019 is low restriction period which days many national workers work in this period. Number of foreign workers and unknown are nearly equal at the same while, low than national workers.
On 4th of April 2020 to 28 th of April 2020 is high restriction period which time national workers, foreign workers and unknown are zero level.
After this period, start low restriction and number of national workers, foreign workers and unknown are equal but not high.
This graph takes from Cassino, finished good production: output inventory level.
January to March and November to December are low restriction periods, on that time, Good productions increase highly than in 2020.
March to November is high restriction time. On that period, Good production is little high than in 2019.