Resections, actual/predicted survival and incremental survival improvements over study period
| Year | Number of resections | 1 yr survival% | 5 yr survival (%) (actual or predicted*) | Improvement in 1 yr survival | Improvement in 5 yr survival |
| 1995 | 3220 (mean) | 23.2 | 6.5 | +0.73%/yr | +0.22%/yr |
| 1996 | 23.3 | 6.7 | |||
| 1997 | 25.1 | 7.4 | |||
| 1998 | 25.0 | 7.2 | |||
| 1999 | 26.1 | 7.4 | |||
| 2000 | 27.4 | 8.0 | +0.48%/yr | +0.12%/yr | |
| 2001 | 27.7 | 8.2 | |||
| 2002 | 28.0 | 8.0 | |||
| 2003 | 29.2 | 9.1 | |||
| 2004 | 29.2 | 8.5 | |||
| 2005 | 30.3 | 9.1 | +0.79%/yr | +0.65%/yr | |
| 2006 | 3740 | 30.1 | 9.1 | ||
| 2007 | 4100 | 32.2 | 10.3 | ||
| 2008 | 4350 | 32.5 | 10.8 | ||
| 2009 | 4500 | 33.5 | 11.8* | ||
| 2010 | 5250 | 34.8 | 12.7* | +2.15%/yr | +1.05%/yr |
| 2011 | 6360 | 36.3 | 13.8* | ||
| 2012 | 6474 | 39.0 | 14.9* | ||
| 2013 | 6713 | n/a | 16.0* | ||