| january 1981 - december 1980 |
0.62 % |
|
january 1981 - january 1980 |
13.05 % |
| february 1981 - january 1981 |
0.90 % |
|
february 1981 - february 1980 |
12.46 % |
| march 1981 - february 1981 |
1.50 % |
|
march 1981 - march 1980 |
12.61 % |
| april 1981 - march 1981 |
2.89 % |
|
april 1981 - april 1980 |
12.04 % |
| may 1981 - april 1981 |
0.65 % |
|
may 1981 - may 1980 |
11.74 % |
| june 1981 - may 1981 |
0.58 % |
|
june 1981 - june 1980 |
11.33 % |
| july 1981 - june 1981 |
0.44 % |
|
july 1981 - july 1980 |
10.90 % |
| august 1981 - july 1981 |
0.74 % |
|
august 1981 - august 1980 |
11.47 % |
| september 1981 - august 1981 |
0.57 % |
|
september 1981 - september 1980 |
11.40 % |
| october 1981 - september 1981 |
0.90 % |
|
october 1981 - october 1980 |
11.70 % |
| november 1981 - october 1981 |
1.05 % |
|
november 1981 - november 1980 |
11.97 % |
| december 1981 - november 1981 |
0.62 % |
|
december 1981 - december 1980 |
12.05 % |