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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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| 2025 | * | * | * | * | * | * | 0 | * | * | |||||||||||||
| 2024 | * | * | * | * | * | * | 0 | * | * | |||||||||||||
| 2023 | * | * | * | * | * | * | 0 | * | * | |||||||||||||
| 2022 | * | * | * | * | * | * | 0 | * | * | |||||||||||||
| 2021 | * | * | * | * | * | * | 0 | * | * | |||||||||||||
| 2020 | * | * | * | * | * | * | 0 | * | * | |||||||||||||
| 2019 | * | * | * | * | * | * | 0 | * | * | |||||||||||||
| 2018 | * | * | * | * | * | * | 0 | * | * | |||||||||||||
| 2017 | * | * | * | * | * | * | 0 | * | * | |||||||||||||
| 2016 | * | * | * | * | * | * | 0 | * | * | |||||||||||||
| 2015 | * | * | * | * | * | * | 0 | * | * | |||||||||||||
| 2014 | * | * | * | * | * | * | 0 | * | * | |||||||||||||
| 2013 | 0.02 | 0.02 | 0.062 | 0.14 | 0.28 | 0.068 | 30 | 0.04 | 67 | |||||||||||||
| 2012 | 0.02 | 0.02 | 0.055 | 0.12 | 0.20 | 0.049 | 30 | 0.04 | 59 | |||||||||||||
| 2011 | 0.02 | 0.04 | 0.066 | 0.16 | 0.21 | 0.058 | 31 | 0.04 | 72 | |||||||||||||
| 2010 | 0.02 | 0.04 | 0.063 | 0.13 | 0.24 | 0.056 | 30 | 0.04 | 68 | |||||||||||||
| 2009 | 0.02 | 0.05 | 0.073 | 0.19 | 0.30 | 0.073 | 31 | 0.04 | 79 | |||||||||||||
| 2008 | 0.02 | 0.05 | 0.068 | 0.16 | 0.23 | 0.062 | 30 | 0.04 | 74 | |||||||||||||
| 2007 | 0.02 | 0.05 | 0.090 | 0.16 | 0.35 | 0.078 | 28 | 0.04 | 97 | |||||||||||||
| 2006 | 0.02 | 0.02 | 0.073 | 0.21 | 0.39 | 0.091 | 32 | 0.04 | 79 | |||||||||||||
| 2005 | 0.02 | 0.02 | 0.082 | 0.19 | 0.38 | 0.088 | 28 | 0.04 | 88 | |||||||||||||
| 2004 | 0.02 | 0.08 | 0.077 | 0.16 | 0.20 | 0.057 | 30 | 0.04 | 84 | |||||||||||||
| 2003 | 0.02 | 0.06 | 0.101 | 0.24 | 0.38 | 0.095 | 30 | 0.04 | 109 | |||||||||||||
| 2002 | 0.02 | 0.08 | 0.133 | 0.31 | 0.40 | 0.109 | 29 | 0.04 | 144 | |||||||||||||
| 2001 | 0.02 | 0.10 | 0.162 | 0.39 | 0.66 | 0.167 | 30 | 0.04 | 175 | |||||||||||||
| 2000 | 0.02 | 0.09 | 0.182 | 0.38 | 0.69 | 0.178 | 29 | 0.04 | 197 | |||||||||||||
| 1999 | 0.02 | 0.11 | 0.240 | 0.47 | 0.79 | 0.205 | 29 | 0.04 | 259 | |||||||||||||
| 1998 | 0.02 | 0.11 | 0.240 | 0.56 | 0.81 | 0.226 | 26 | 0.04 | 259 | |||||||||||||
| 1997 | 0.02 | 0.15 | 0.235 | 0.42 | 0.76 | 0.188 | 27 | 0.04 | 254 | |||||||||||||
| 1996 | 0.02 | 0.17 | 0.252 | 0.47 | 0.90 | 0.216 | 30 | 0.04 | 272 | |||||||||||||
| 1995 | 0.08 | 0.20 | 0.279 | 0.61 | 0.77 | 0.194 | 29 | 0.04 | 301 | |||||||||||||
| 1994 | 0.02 | 0.26 | * | 0.73 | 0.89 | 0.245 | 28 | 0.04 | * | |||||||||||||
| 1993 | 0.02 | 0.25 | 0.398 | 0.85 | 1.3 | 0.340 | 28 | 0.04 | 431 | |||||||||||||
| 1992 | 0.02 | 0.20 | 0.331 | 0.79 | 0.88 | 0.269 | 28 | 0.04 | 358 | |||||||||||||
| 1991 | 0.02 | 0.16 | 0.332 | 0.75 | 1.0 | 0.285 | 29 | 0.04 | 359 | |||||||||||||
| 1990 | 0.07 | 0.30 | 0.387 | 0.88 | 1.2 | 0.306 | 31 | 0.04 | 418 | |||||||||||||
| 1989 | 0.11 | 0.35 | 0.447 | 0.98 | 1.4 | 0.359 | 22 | 0.04 | 483 | |||||||||||||
| 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. |
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