0
20
40
60
80
100
120
0
20
40
60
80
100
120
1984u
1985g
1985u
1986g
1986u
1987g
1987u
1988g
1988u
1989g
1989u
1990g
1990u
1991g
1991u
1992g
1992u
1993g
1993u
1994g
1994u
plotly-logomark