40 days
22
days
30
7
days
20
10
0
1980
1990
2000
2010
2020
40 days
22
days
30
7
days
20
10
0
1980
1990
2000
2010
2020
40 days
30
22
days
20
7
days
10
0
1980
2000
2010
1990
2020
40 days
30
22
days
20
7
days
10
0
1980
2000
2010
1990
2020