6 months
3 months
1 month
50%
40
30
20
10
0
1950
1960
1970
1980
1990
2000
2010
2020
6 months
3 months
1 month
50%
40
30
20
10
0
1950
1960
1970
1980
1990
2000
2010
2020
6 months
3 months
1 month
50%
40
30
20
10
0
1950
1960
1970
1980
1990
2000
2010
2020
6 months
3 months
1 month
50%
40
30
20
10
0
1950
1960
1970
1980
1990
2000
2010
2020