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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 | * | 0.12 | 0.57 | 0.123 | 20 | 0.04 | * | |||||||||||||
2022 | 0.02 | 0.02 | 0.077 | 0.18 | 0.69 | 0.139 | 31 | 0.04 | 84 | |||||||||||||
2021 | 0.02 | 0.02 | * | 0.14 | 0.24 | 0.063 | 23 | 0.04 | * | |||||||||||||
2020 | 0.02 | * | * | * | 0.30 | 0.121 | 7 | 0.04 | * | |||||||||||||
2019 | 0.02 | 0.02 | 0.056 | 0.13 | 0.20 | 0.053 | 28 | 0.04 | 61 | |||||||||||||
2018 | 0.02 | 0.06 | 0.075 | 0.14 | 0.27 | 0.064 | 28 | 0.04 | 81 | |||||||||||||
2017 | 0.02 | 0.02 | 0.073 | 0.22 | 0.38 | 0.099 | 29 | 0.04 | 79 | |||||||||||||
2016 | 0.02 | 0.08 | 0.124 | 0.32 | 0.55 | 0.138 | 30 | 0.04 | 134 | |||||||||||||
2015 | 0.02 | 0.06 | 0.103 | 0.26 | 0.47 | 0.124 | 30 | 0.04 | 111 | |||||||||||||
2014 | 0.02 | 0.02 | 0.135 | 0.29 | 1.0 | 0.203 | 30 | 0.04 | 146 | |||||||||||||
2013 | 0.02 | 0.06 | 0.108 | 0.33 | 0.41 | 0.114 | 31 | 0.04 | 117 | |||||||||||||
2012 | 0.02 | 0.05 | 1.53 | 0.53 | 32 | 5.92 | 29 | 0.04 | 1649 | |||||||||||||
2011 | 0.02 | 0.06 | 0.112 | 0.29 | 0.49 | 0.127 | 31 | 0.04 | 121 | |||||||||||||
2010 | 0.02 | 0.09 | * | 0.25 | 0.46 | 0.128 | 19 | 0.04 | * | |||||||||||||
2009 | 0.02 | 0.08 | 0.131 | 0.27 | 0.83 | 0.171 | 31 | 0.04 | 141 | |||||||||||||
2008 | 0.02 | 0.09 | 0.116 | 0.32 | 0.57 | 0.136 | 29 | 0.04 | 125 | |||||||||||||
2007 | 0.02 | 0.09 | 0.182 | 0.43 | 0.87 | 0.204 | 28 | 0.04 | 197 | |||||||||||||
2006 | 0.02 | 0.11 | 0.196 | 0.39 | 1.1 | 0.236 | 31 | 0.04 | 211 | |||||||||||||
2005 | 0.02 | 0.09 | 0.205 | 0.51 | 1.3 | 0.273 | 30 | 0.04 | 222 | |||||||||||||
2004 | 0.02 | 0.09 | 0.194 | 0.53 | 0.74 | 0.207 | 31 | 0.04 | 210 | |||||||||||||
2003 | 0.02 | 0.10 | 0.231 | 0.55 | 1.2 | 0.285 | 30 | 0.04 | 250 | |||||||||||||
2002 | 0.02 | 0.15 | 0.405 | 1.05 | 2.8 | 0.636 | 30 | 0.04 | 438 | |||||||||||||
2001 | 0.02 | 0.15 | 0.236 | 0.42 | 1.1 | 0.240 | 31 | 0.04 | 255 | |||||||||||||
2000 | 0.02 | 0.13 | 0.294 | 0.81 | 1.2 | 0.320 | 31 | 0.04 | 317 | |||||||||||||
1999 | 0.02 | 0.25 | 0.431 | 1.0 | 3.0 | 0.606 | 29 | 0.04 | 466 | |||||||||||||
1998 | 0.02 | 0.22 | * | 0.48 | 1.4 | 0.318 | 28 | 0.04 | * | |||||||||||||
1997 | 0.02 | 0.19 | 0.281 | 0.70 | 1.0 | 0.281 | 27 | 0.04 | 304 | |||||||||||||
1996 | 0.02 | 0.23 | 0.419 | 0.94 | 1.5 | 0.407 | 30 | 0.04 | 453 | |||||||||||||
1995 | 0.08 | 0.34 | * | 1.37 | 3.2 | 0.885 | 12 | 0.04 | * | |||||||||||||
1994 | * | * | * | * | * | * | 0 | * | * | |||||||||||||
1993 | * | * | * | * | * | * | 0 | * | * | |||||||||||||
1992 | * | * | * | * | * | * | 0 | * | * | |||||||||||||
1991 | * | * | * | * | * | * | 0 | * | * | |||||||||||||
1990 | * | * | * | * | * | * | 0 | * | * | |||||||||||||
1989 | * | * | * | * | * | * | 0 | * | * | |||||||||||||
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. |