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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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2024 | 0.02 | 0.02 | * | 0.05 | 0.10 | 0.021 | 17 | 0.04 | * | |||||||||||||
2023 | 0.02 | 0.02 | 0.033 | 0.06 | 0.08 | 0.019 | 31 | 0.04 | 36 | |||||||||||||
2022 | 0.02 | 0.02 | 0.023 | 0.02 | 0.05 | 0.010 | 30 | 0.04 | 25 | |||||||||||||
2021 | 0.02 | 0.02 | * | 0.05 | 0.07 | 0.013 | 23 | 0.04 | * | |||||||||||||
2020 | 0.02 | * | * | * | 0.07 | 0.023 | 9 | 0.04 | * | |||||||||||||
2019 | 0.02 | 0.02 | 0.029 | 0.06 | 0.08 | 0.017 | 29 | 0.04 | 31 | |||||||||||||
2018 | 0.02 | 0.02 | 0.035 | 0.05 | 0.12 | 0.026 | 31 | 0.04 | 38 | |||||||||||||
2017 | 0.02 | 0.02 | 0.039 | 0.07 | 0.12 | 0.030 | 29 | 0.04 | 42 | |||||||||||||
2016 | 0.02 | 0.02 | 0.049 | 0.09 | 0.13 | 0.034 | 30 | 0.04 | 53 | |||||||||||||
2015 | 0.02 | 0.02 | 0.045 | 0.09 | 0.12 | 0.031 | 31 | 0.04 | 48 | |||||||||||||
2014 | 0.02 | 0.02 | 0.037 | 0.07 | 0.09 | 0.022 | 28 | 0.04 | 40 | |||||||||||||
2013 | 0.02 | 0.02 | 0.039 | 0.07 | 0.14 | 0.034 | 30 | 0.04 | 42 | |||||||||||||
2012 | 0.02 | 0.02 | 0.039 | 0.07 | 0.13 | 0.029 | 30 | 0.04 | 42 | |||||||||||||
2011 | 0.02 | 0.02 | 0.039 | 0.09 | 0.12 | 0.032 | 31 | 0.04 | 42 | |||||||||||||
2010 | 0.02 | 0.02 | 0.053 | 0.10 | 0.18 | 0.041 | 30 | 0.04 | 57 | |||||||||||||
2009 | 0.02 | 0.05 | 0.064 | 0.14 | 0.16 | 0.046 | 32 | 0.04 | 70 | |||||||||||||
2008 | 0.02 | 0.05 | 0.055 | 0.12 | 0.15 | 0.039 | 30 | 0.04 | 60 | |||||||||||||
2007 | 0.02 | 0.02 | 0.056 | 0.11 | 0.19 | 0.048 | 31 | 0.04 | 60 | |||||||||||||
2006 | 0.02 | 0.05 | * | 0.14 | 0.24 | 0.057 | 26 | 0.04 | * | |||||||||||||
2005 | 0.02 | 0.05 | 0.064 | 0.15 | 0.20 | 0.056 | 29 | 0.04 | 69 | |||||||||||||
2004 | 0.02 | 0.06 | 0.070 | 0.13 | 0.18 | 0.045 | 31 | 0.04 | 75 | |||||||||||||
2003 | 0.02 | 0.08 | * | 0.14 | 0.20 | 0.056 | 28 | 0.04 | * | |||||||||||||
2002 | 0.02 | 0.10 | 0.107 | 0.23 | 0.29 | 0.079 | 31 | 0.04 | 116 | |||||||||||||
2001 | 0.02 | 0.09 | 0.110 | 0.26 | 0.36 | 0.094 | 30 | 0.04 | 119 | |||||||||||||
2000 | 0.02 | 0.09 | 0.136 | 0.32 | 0.51 | 0.127 | 30 | 0.04 | 147 | |||||||||||||
1999 | 0.02 | 0.25 | * | 0.39 | 0.44 | 0.140 | 21 | 0.04 | * | |||||||||||||
1998 | 0.02 | 0.13 | 0.153 | 0.32 | 0.40 | 0.110 | 29 | 0.04 | 165 | |||||||||||||
1997 | 0.02 | 0.14 | 0.162 | 0.32 | 0.60 | 0.125 | 30 | 0.04 | 175 | |||||||||||||
1996 | 0.02 | 0.15 | * | 0.29 | 0.59 | 0.129 | 26 | 0.04 | * | |||||||||||||
1995 | 0.07 | 0.19 | 0.205 | 0.34 | 0.49 | 0.101 | 29 | 0.04 | 221 | |||||||||||||
1994 | 0.07 | 0.20 | 0.262 | 0.45 | 0.54 | 0.149 | 31 | 0.04 | 283 | |||||||||||||
1993 | 0.02 | 0.19 | 0.225 | 0.43 | 0.59 | 0.144 | 31 | 0.04 | 243 | |||||||||||||
1992 | 0.02 | 0.14 | 0.184 | 0.35 | 0.44 | 0.124 | 30 | 0.04 | 199 | |||||||||||||
1991 | 0.02 | 0.11 | 0.183 | 0.39 | 0.62 | 0.158 | 29 | 0.04 | 197 | |||||||||||||
1990 | 0.02 | 0.25 | 0.278 | 0.54 | 0.65 | 0.162 | 31 | 0.04 | 301 | |||||||||||||
1989 | 0.02 | 0.27 | 0.255 | 0.49 | 0.53 | 0.153 | 24 | 0.04 | 275 | |||||||||||||
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. |