Year | N | Mean | SD | Median | Min | Max | 95% CI |
2002 | 47 | 1747 | 2409.296 | 1,053 | 111.0 | 15979.0 | (679.5, 2006.5) |
2003 | 47 | 2028 | 2761.937 | 1,355 | 154.0 | 18360.0 | (746.5, 2386.0) |
2004 | 47 | 2249 | 2954.713 | 1,497 | 138.0 | 19871.0 | (928.5, 2620.0) |
2005 | 47 | 2302 | 2913.039 | 1,549 | 124.0 | 19487.0 | (938.5, 2737.5) |
2006 | 47 | 2452 | 2934.737 | 1,757 | 172 | 19,472 | (1044, 2844) |
2007 | 47 | 2416 | 2836.123 | 1,988 | 177.0 | 18901.0 | (966.5, 2786.5) |
2008 | 47 | 2291 | 2790.387 | 1,676 | 223.0 | 18589.0 | (850.5, 2623.0) |
2009 | 47 | 2346 | 2843.675 | 1,700 | 249 | 18,984 | (896, 2724) |