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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 | * | 0.02 | 0.02 | 0.000 | 19 | 0.04 | * | |||||||||||||
2022 | 0.02 | 0.02 | 0.022 | 0.02 | 0.05 | 0.007 | 30 | 0.04 | 24 | |||||||||||||
2021 | 0.02 | 0.02 | * | 0.02 | 0.07 | 0.010 | 23 | 0.04 | * | |||||||||||||
2020 | 0.02 | * | * | * | 0.02 | 0.000 | 9 | 0.04 | * | |||||||||||||
2019 | 0.02 | 0.02 | 0.024 | 0.04 | 0.08 | 0.012 | 30 | 0.04 | 26 | |||||||||||||
2018 | 0.02 | 0.02 | 0.033 | 0.05 | 0.19 | 0.034 | 30 | 0.04 | 36 | |||||||||||||
2017 | 0.02 | 0.02 | 0.036 | 0.07 | 0.16 | 0.033 | 30 | 0.04 | 39 | |||||||||||||
2016 | 0.02 | 0.02 | 0.032 | 0.07 | 0.14 | 0.027 | 31 | 0.04 | 35 | |||||||||||||
2015 | 0.02 | 0.02 | 0.038 | 0.09 | 0.10 | 0.028 | 30 | 0.04 | 41 | |||||||||||||
2014 | 0.02 | 0.02 | 0.037 | 0.08 | 0.11 | 0.027 | 30 | 0.04 | 40 | |||||||||||||
2013 | 0.02 | 0.02 | 0.036 | 0.07 | 0.13 | 0.031 | 31 | 0.04 | 39 | |||||||||||||
2012 | 0.02 | 0.02 | 0.034 | 0.09 | 0.14 | 0.034 | 29 | 0.04 | 36 | |||||||||||||
2011 | 0.02 | 0.02 | 0.044 | 0.09 | 0.18 | 0.039 | 31 | 0.04 | 48 | |||||||||||||
2010 | 0.02 | 0.02 | 0.048 | 0.12 | 0.14 | 0.039 | 29 | 0.04 | 52 | |||||||||||||
2009 | 0.02 | 0.02 | 0.048 | 0.10 | 0.15 | 0.036 | 28 | 0.04 | 52 | |||||||||||||
2008 | 0.02 | 0.02 | 0.036 | 0.07 | 0.10 | 0.025 | 31 | 0.04 | 39 | |||||||||||||
2007 | 0.02 | 0.02 | 0.048 | 0.11 | 0.20 | 0.048 | 29 | 0.04 | 51 | |||||||||||||
2006 | 0.02 | 0.05 | 0.063 | 0.14 | 0.26 | 0.058 | 30 | 0.04 | 68 | |||||||||||||
2005 | 0.02 | 0.02 | 0.053 | 0.14 | 0.19 | 0.050 | 31 | 0.04 | 58 | |||||||||||||
2004 | 0.02 | 0.05 | 0.083 | 0.17 | 0.31 | 0.074 | 30 | 0.04 | 90 | |||||||||||||
2003 | 0.02 | 0.06 | 0.084 | 0.21 | 0.25 | 0.071 | 31 | 0.04 | 91 | |||||||||||||
2002 | 0.06 | 0.13 | * | 0.33 | 0.41 | 0.111 | 16 | 0.04 | * | |||||||||||||
2001 | 0.02 | 0.09 | 0.113 | 0.22 | 0.38 | 0.091 | 30 | 0.04 | 122 | |||||||||||||
2000 | 0.02 | 0.07 | 0.128 | 0.23 | 0.59 | 0.126 | 29 | 0.04 | 139 | |||||||||||||
1999 | 0.04 | 0.15 | 0.173 | 0.32 | 0.49 | 0.120 | 26 | 0.04 | 187 | |||||||||||||
1998 | 0.02 | 0.18 | 0.215 | 0.40 | 0.74 | 0.161 | 31 | 0.04 | 232 | |||||||||||||
1997 | 0.02 | 0.13 | 0.165 | 0.35 | 0.67 | 0.140 | 30 | 0.04 | 178 | |||||||||||||
1996 | 0.02 | 0.13 | 0.181 | 0.40 | 0.64 | 0.146 | 31 | 0.04 | 195 | |||||||||||||
1995 | 0.10 | 0.16 | 0.226 | 0.44 | 0.85 | 0.167 | 29 | 0.04 | 245 | |||||||||||||
1994 | 0.07 | 0.20 | 0.259 | 0.53 | 0.66 | 0.166 | 30 | 0.04 | 280 | |||||||||||||
1993 | 0.08 | 0.20 | * | 0.65 | 0.89 | 0.222 | 27 | 0.04 | * | |||||||||||||
1992 | 0.02 | 0.20 | 0.234 | 0.47 | 0.62 | 0.165 | 30 | 0.04 | 253 | |||||||||||||
1991 | 0.07 | 0.17 | 0.252 | 0.51 | 0.89 | 0.198 | 26 | 0.04 | 272 | |||||||||||||
1990 | 0.02 | 0.23 | * | 0.62 | 0.79 | 0.201 | 27 | 0.04 | * | |||||||||||||
1989 | 0.08 | 0.23 | 0.331 | 0.65 | 1.1 | 0.252 | 23 | 0.04 | 358 | |||||||||||||
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. |