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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 | 0.02 | 0.02 | * | 0.02 | 0.02 | 0.000 | 16 | 0.04 | * | |||||||||||||
2021 | 0.02 | 0.02 | * | 0.02 | 0.05 | 0.005 | 23 | 0.04 | * | |||||||||||||
2020 | 0.02 | * | * | * | 0.06 | 0.012 | 9 | 0.04 | * | |||||||||||||
2019 | 0.02 | 0.02 | 0.023 | 0.02 | 0.07 | 0.010 | 30 | 0.04 | 25 | |||||||||||||
2018 | 0.02 | 0.02 | 0.025 | 0.02 | 0.08 | 0.013 | 30 | 0.04 | 27 | |||||||||||||
2017 | 0.02 | 0.02 | 0.023 | 0.02 | 0.09 | 0.015 | 30 | 0.04 | 25 | |||||||||||||
2016 | 0.02 | 0.02 | 0.035 | 0.08 | 0.10 | 0.027 | 31 | 0.04 | 38 | |||||||||||||
2015 | 0.02 | 0.02 | 0.029 | 0.05 | 0.08 | 0.015 | 28 | 0.04 | 31 | |||||||||||||
2014 | 0.02 | 0.02 | 0.027 | 0.05 | 0.10 | 0.018 | 28 | 0.04 | 29 | |||||||||||||
2013 | 0.02 | 0.02 | * | 0.07 | 0.10 | 0.025 | 26 | 0.04 | * | |||||||||||||
2012 | 0.02 | 0.02 | * | 0.08 | 0.10 | 0.027 | 20 | 0.04 | * | |||||||||||||
2011 | 0.02 | 0.02 | 0.031 | 0.06 | 0.10 | 0.021 | 31 | 0.04 | 34 | |||||||||||||
2010 | 0.02 | 0.02 | 0.035 | 0.07 | 0.11 | 0.026 | 30 | 0.04 | 38 | |||||||||||||
2009 | 0.02 | 0.02 | 0.041 | 0.09 | 0.12 | 0.031 | 31 | 0.04 | 44 | |||||||||||||
2008 | 0.02 | 0.02 | 0.034 | 0.07 | 0.10 | 0.023 | 32 | 0.04 | 37 | |||||||||||||
2007 | 0.02 | 0.02 | 0.044 | 0.09 | 0.17 | 0.039 | 31 | 0.04 | 48 | |||||||||||||
2006 | 0.02 | 0.02 | 0.049 | 0.11 | 0.15 | 0.038 | 31 | 0.04 | 53 | |||||||||||||
2005 | 0.02 | 0.02 | 0.047 | 0.10 | 0.18 | 0.045 | 30 | 0.04 | 51 | |||||||||||||
2004 | 0.02 | 0.04 | 0.053 | 0.12 | 0.16 | 0.043 | 31 | 0.04 | 58 | |||||||||||||
2003 | 0.02 | 0.06 | 0.067 | 0.12 | 0.24 | 0.051 | 31 | 0.04 | 72 | |||||||||||||
2002 | 0.02 | 0.08 | 0.134 | 0.26 | 0.44 | 0.107 | 27 | 0.04 | 145 | |||||||||||||
2001 | 0.02 | 0.11 | 0.118 | 0.25 | 0.33 | 0.081 | 27 | 0.04 | 128 | |||||||||||||
2000 | 0.02 | 0.08 | 0.103 | 0.21 | 0.34 | 0.083 | 30 | 0.04 | 112 | |||||||||||||
1999 | 0.02 | 0.10 | * | 0.26 | 0.39 | 0.098 | 25 | 0.04 | * | |||||||||||||
1998 | 0.02 | 0.15 | * | 0.19 | 0.37 | 0.077 | 28 | 0.04 | * | |||||||||||||
1997 | 0.02 | 0.14 | 0.138 | 0.24 | 0.41 | 0.086 | 30 | 0.04 | 149 | |||||||||||||
1996 | 0.02 | 0.14 | 0.161 | 0.28 | 0.31 | 0.082 | 30 | 0.04 | 174 | |||||||||||||
1995 | 0.02 | 0.15 | 0.198 | 0.38 | 0.41 | 0.107 | 31 | 0.04 | 214 | |||||||||||||
1994 | 0.02 | 0.18 | 0.230 | 0.35 | 0.56 | 0.128 | 29 | 0.04 | 248 | |||||||||||||
1993 | 0.07 | 0.18 | 0.237 | 0.49 | 0.72 | 0.171 | 28 | 0.04 | 257 | |||||||||||||
1992 | 0.02 | 0.16 | 0.182 | 0.36 | 0.54 | 0.133 | 29 | 0.04 | 197 | |||||||||||||
1991 | 0.02 | 0.11 | 0.180 | 0.50 | 0.57 | 0.175 | 29 | 0.04 | 194 | |||||||||||||
1990 | 0.02 | 0.18 | 0.214 | 0.40 | 0.67 | 0.160 | 30 | 0.04 | 232 | |||||||||||||
1989 | 0.02 | 0.16 | 0.242 | 0.49 | 0.59 | 0.195 | 21 | 0.04 | 262 | |||||||||||||
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. |