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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 | * | * | |||||||||||||
2022 | 0.01 | 0.01 | * | 0.01 | 0.04 | 0.008 | 11 | 0.02 | * | |||||||||||||
2021 | 0.01 | 0.01 | * | 0.01 | 0.01 | 0.000 | 22 | 0.02 | * | |||||||||||||
2020 | 0.01 | * | * | * | 0.01 | 0.000 | 5 | 0.02 | * | |||||||||||||
2019 | 0.01 | 0.01 | * | 0.01 | 0.03 | 0.004 | 20 | 0.02 | * | |||||||||||||
2018 | 0.01 | 0.01 | * | 0.01 | 0.02 | 0.003 | 20 | 0.02 | * | |||||||||||||
2017 | 0.01 | 0.01 | 0.010 | 0.01 | 0.01 | 0.000 | 29 | 0.02 | 0.3 | |||||||||||||
2016 | 0.01 | 0.01 | 0.013 | 0.02 | 0.04 | 0.007 | 31 | 0.02 | 0.4 | |||||||||||||
2015 | 0.01 | 0.01 | 0.019 | 0.03 | 0.13 | 0.026 | 26 | 0.02 | 0.6 | |||||||||||||
2014 | 0.01 | 0.03 | * | 0.08 | 0.12 | 0.030 | 24 | 0.02 | * | |||||||||||||
2013 | 0.01 | 0.02 | 0.030 | 0.06 | 0.12 | 0.027 | 31 | 0.02 | 0.9 | |||||||||||||
2012 | 0.01 | 0.01 | 0.024 | 0.05 | 0.19 | 0.035 | 29 | 0.02 | 0.7 | |||||||||||||
2011 | 0.01 | 0.02 | 0.042 | 0.06 | 0.75 | 0.132 | 31 | 0.02 | 1 | |||||||||||||
2010 | 0.01 | 0.02 | 0.036 | 0.07 | 0.22 | 0.042 | 29 | 0.02 | 1 | |||||||||||||
2009 | 0.01 | 0.01 | 0.029 | 0.05 | 0.18 | 0.034 | 29 | 0.02 | 0.9 | |||||||||||||
2008 | 0.01 | 0.02 | 0.028 | 0.07 | 0.07 | 0.022 | 29 | 0.02 | 0.9 | |||||||||||||
2007 | 0.01 | 0.04 | 0.042 | 0.06 | 0.10 | 0.021 | 23 | 0.02 | 1 | |||||||||||||
2006 | 0.01 | 0.03 | * | 0.07 | 0.10 | 0.024 | 25 | 0.02 | * | |||||||||||||
2005 | 0.01 | 0.05 | 0.053 | 0.06 | 0.28 | 0.050 | 30 | 0.02 | 2 | |||||||||||||
2004 | 0.01 | 0.04 | 0.040 | 0.06 | 0.08 | 0.016 | 24 | 0.02 | 1 | |||||||||||||
2003 | 0.01 | 0.03 | 0.035 | 0.06 | 0.10 | 0.023 | 29 | 0.02 | 1 | |||||||||||||
2002 | 0.01 | 0.03 | * | 0.07 | 0.08 | 0.021 | 23 | 0.02 | * | |||||||||||||
2001 | 0.01 | 0.28 | 0.314 | 0.55 | 1.7 | 0.356 | 28 | 0.02 | 10 | |||||||||||||
2000 | 0.03 | 0.34 | 0.379 | 0.81 | 0.91 | 0.271 | 29 | 0.02 | 12 | |||||||||||||
1999 | 0.01 | 0.16 | * | 1.02 | 3.3 | 0.770 | 19 | 0.02 | * | |||||||||||||
1998 | 0.01 | 0.15 | 0.195 | 0.35 | 1.3 | 0.244 | 29 | 0.02 | 6 | |||||||||||||
1997 | 0.01 | 0.17 | * | 0.41 | 0.59 | 0.149 | 22 | 0.02 | * | |||||||||||||
1996 | 0.01 | 0.11 | 0.173 | 0.45 | 0.62 | 0.162 | 28 | 0.02 | 5 | |||||||||||||
1995 | 0.02 | 0.15 | 0.270 | 0.53 | 2.4 | 0.432 | 31 | 0.02 | 8 | |||||||||||||
1994 | 0.01 | 0.13 | 0.504 | 0.33 | 8.7 | 1.59 | 29 | 0.02 | 15 | |||||||||||||
1993 | 0.01 | 0.15 | 0.165 | 0.32 | 0.83 | 0.172 | 26 | 0.02 | 5 | |||||||||||||
1992 | 0.07 | 0.32 | 0.370 | 0.59 | 1.3 | 0.234 | 31 | 0.02 | 11 | |||||||||||||
1991 | 0.03 | 0.14 | 0.228 | 0.48 | 0.79 | 0.186 | 28 | 0.02 | 7 | |||||||||||||
1990 | 0.03 | 0.11 | 0.130 | 0.22 | 0.68 | 0.126 | 28 | 0.02 | 4 | |||||||||||||
1989 | 0.09 | 0.20 | * | 0.47 | 1.0 | 0.210 | 21 | 0.02 | * | |||||||||||||
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. |