Exo6

data;
param:nrange :t:=
1  1790  
2  1800  
3  1810  
4  1820  
5  1830  
6  1840 
7  1850
8  1860  
9  1870  
10 1880  
11 1890  
12 1900  
13 1910  
14 1920  
15 1930  
16 1940  
17 1950 
18 1960 
19 1970 
20 1980
21 1990 
22 2000;

param P:=
1  3.93
2  5.31
3  7.24
4  9.64
5  12.86
6  17.06
7  23.19
8  31.44
9  38.56
10 50.19
11 62.98
12 76.21
13 92.23
14 106.02
15 123.20
16 132.16
17 151.33
18 179.32
19 203.30
20 226.54
21 248.71
22 281.42
;

model;