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Read About Estimated Risk |
Year | Months Present |
Minimum | Median | Mean | 90th Percentile |
Maximum | Standard Deviation |
Number of Observations |
Detection Limit |
Estimated Risk |
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2023 | 0.02 | 0.02 | * | 0.06 | 0.09 | 0.020 | 20 | 0.04 | * | |||||||||||||
2022 | 0.02 | 0.02 | 0.039 | 0.09 | 0.12 | 0.032 | 29 | 0.04 | 42 | |||||||||||||
2021 | 0.02 | 0.02 | * | 0.10 | 0.11 | 0.034 | 22 | 0.04 | * | |||||||||||||
2020 | 0.02 | * | * | * | 0.10 | 0.035 | 7 | 0.04 | * | |||||||||||||
2019 | 0.02 | 0.02 | * | 0.06 | 0.13 | 0.027 | 26 | 0.04 | * | |||||||||||||
2018 | * | * | * | * | * | * | 0 | * | * | |||||||||||||
2017 | 0.02 | 0.02 | * | 0.07 | 0.12 | 0.029 | 20 | 0.04 | * | |||||||||||||
2016 | 0.02 | 0.02 | 0.053 | 0.12 | 0.17 | 0.046 | 29 | 0.04 | 57 | |||||||||||||
2015 | 0.02 | 0.06 | * | 0.15 | 0.23 | 0.055 | 25 | 0.04 | * | |||||||||||||
2014 | 0.02 | 0.02 | 0.056 | 0.13 | 0.20 | 0.055 | 28 | 0.04 | 61 | |||||||||||||
2013 | 0.02 | 0.05 | 0.065 | 0.11 | 0.33 | 0.064 | 31 | 0.04 | 70 | |||||||||||||
2012 | 0.02 | 0.02 | 0.050 | 0.11 | 0.17 | 0.042 | 30 | 0.04 | 54 | |||||||||||||
2011 | 0.02 | 0.02 | 0.049 | 0.12 | 0.18 | 0.045 | 31 | 0.04 | 53 | |||||||||||||
2010 | 0.02 | 0.05 | 0.067 | 0.15 | 0.26 | 0.056 | 31 | 0.04 | 73 | |||||||||||||
2009 | 0.02 | 0.05 | * | 0.20 | 0.34 | 0.082 | 27 | 0.04 | * | |||||||||||||
2008 | 0.02 | 0.05 | 0.060 | 0.11 | 0.14 | 0.040 | 30 | 0.04 | 65 | |||||||||||||
2007 | 0.02 | 0.05 | 0.080 | 0.24 | 0.29 | 0.084 | 30 | 0.04 | 87 | |||||||||||||
2006 | 0.02 | 0.07 | 0.083 | 0.20 | 0.29 | 0.073 | 29 | 0.04 | 90 | |||||||||||||
2005 | 0.02 | 0.07 | 0.112 | 0.22 | 0.51 | 0.117 | 31 | 0.04 | 121 | |||||||||||||
2004 | 0.02 | 0.10 | 0.121 | 0.24 | 0.36 | 0.086 | 30 | 0.04 | 130 | |||||||||||||
2003 | 0.02 | 0.10 | 0.118 | 0.29 | 0.35 | 0.098 | 30 | 0.04 | 128 | |||||||||||||
2002 | 0.02 | 0.10 | * | 0.50 | 0.56 | 0.178 | 26 | 0.04 | * | |||||||||||||
2001 | 0.02 | 0.14 | 0.175 | 0.39 | 0.51 | 0.142 | 31 | 0.04 | 189 | |||||||||||||
2000 | 0.02 | 0.13 | 0.193 | 0.32 | 0.68 | 0.152 | 30 | 0.04 | 208 | |||||||||||||
1999 | 0.02 | 0.11 | 0.208 | 0.44 | 0.69 | 0.184 | 29 | 0.04 | 225 | |||||||||||||
1998 | 0.02 | 0.14 | * | 0.49 | 0.54 | 0.176 | 15 | 0.04 | * | |||||||||||||
1997 | 0.20 | * | * | * | 0.20 | 0.136 | 1 | 0.04 | * | |||||||||||||
1996 | 0.08 | 0.24 | 0.267 | 0.47 | 0.54 | 0.136 | 31 | 0.04 | 289 | |||||||||||||
1995 | 0.08 | 0.25 | 0.332 | 0.68 | 0.97 | 0.223 | 31 | 0.04 | 359 | |||||||||||||
1994 | 0.10 | 0.29 | 0.363 | 0.63 | 0.84 | 0.205 | 31 | 0.04 | 392 | |||||||||||||
1993 | 0.02 | 0.28 | 0.379 | 0.76 | 1.4 | 0.296 | 29 | 0.04 | 410 | |||||||||||||
1992 | 0.02 | 0.23 | 0.292 | 0.77 | 0.82 | 0.237 | 30 | 0.04 | 315 | |||||||||||||
1991 | 0.02 | 0.22 | 0.312 | 0.68 | 0.73 | 0.239 | 29 | 0.04 | 337 | |||||||||||||
1990 | 0.08 | 0.25 | 0.340 | 0.65 | 0.94 | 0.235 | 28 | 0.04 | 368 | |||||||||||||
1989 | 0.02 | 0.30 | 0.354 | 0.71 | 1.1 | 0.257 | 23 | 0.04 | 382 | |||||||||||||
Notes: | Values below the Limit of Detection (LoD) assumed to be ½ LoD. Means and risks shown only for years with data in all 12 months. "*" means there was insufficient or no data available to determine the value. |