| 1986 |
| 1987 |
| 1988 |
| 1989 |
| 1990 |
| 1991 |
| 1992 |
| 1993 |
| 1994 |
| 1995 |
| 1996 |
| 1997 |
| 1998 |
| 1999 |
| 2000 |
| 2001 |
| 2002 |
| 2003 |
| 2004 | |
| 121.2 |
114.1 |
123.6 |
116.3 |
117.6 |
110.6 |
| 139.2 |
118.2 |
141.8 |
120.3 |
134.5 |
114.2 |
| 177.7 |
122.2 |
183.7 |
126.4 |
166.5 |
114.5 |
| 197.4 |
116.2 |
205.9 |
121.2 |
180.7 |
106.4 |
| 214.7 |
128.2 |
230.4 |
132.8 |
186.8 |
107.7 |
| 242.4 |
132.4 |
259.4 |
141.6 |
208.3 |
113.7 |
| 288.5 |
144.2 |
316.6 |
159.3 |
229.7 |
114.8 |
| 403.3 |
166.1 |
429 |
176.7 |
310.9 |
128.1 |
| 573.1 |
189.3 |
610.3 |
201.6 |
406.8 |
134.4 |
| 677.6 |
191.4 |
702.9 |
198.5 |
478.4 |
135.1 |
| 756.1 |
194.3 |
774.4 |
199 |
518.5 |
133.2 |
| 840 |
207.4 |
877.8 |
216.7 |
529.5 |
130.7 |
| 883 |
217 |
895.8 |
220.1 |
395.7 |
97.2 |
| 953.1 |
235.4 |
954.2 |
235.7 |
350.2 |
86.5 |
| 1047.2 |
256.3 |
1024.2 |
250.7 |
310.4 |
73.8 |
| 1231.9 |
302.1 |
1224.8 |
300.4 |
251.8 |
61.8 |
| 1387.7 |
343.3 |
1386.2 |
343.1 |
249.8 |
61.8 |
| 1666.8 |
404.7 |
1637 |
397.4 |
262.7 |
63.8 |
| 2124.2 |
496.5 |
1997.6 |
466.9 |
321.3 |
75.1 | |
