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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 | * | 0.06 | 0.07 | 0.019 | 15 | 0.04 | * | |||||||||||||
2023 | 0.02 | 0.02 | 0.025 | 0.04 | 0.08 | 0.015 | 30 | 0.04 | 27 | |||||||||||||
2022 | 0.02 | 0.02 | 0.028 | 0.05 | 0.09 | 0.018 | 31 | 0.04 | 31 | |||||||||||||
2021 | 0.02 | 0.02 | * | 0.02 | 0.04 | 0.006 | 23 | 0.04 | * | |||||||||||||
2020 | 0.02 | * | * | * | 0.07 | 0.020 | 7 | 0.04 | * | |||||||||||||
2019 | 0.02 | 0.02 | 0.024 | 0.02 | 0.07 | 0.010 | 30 | 0.04 | 26 | |||||||||||||
2018 | 0.02 | 0.02 | 0.042 | 0.08 | 0.31 | 0.056 | 31 | 0.04 | 45 | |||||||||||||
2017 | 0.02 | 0.02 | 0.032 | 0.05 | 0.13 | 0.026 | 30 | 0.04 | 34 | |||||||||||||
2016 | 0.02 | 0.02 | 0.037 | 0.09 | 0.15 | 0.036 | 31 | 0.04 | 40 | |||||||||||||
2015 | 0.02 | 0.02 | 0.036 | 0.07 | 0.13 | 0.028 | 30 | 0.04 | 39 | |||||||||||||
2014 | 0.02 | 0.02 | 0.037 | 0.07 | 0.12 | 0.029 | 30 | 0.04 | 40 | |||||||||||||
2013 | 0.02 | 0.02 | 0.039 | 0.11 | 0.14 | 0.038 | 31 | 0.04 | 42 | |||||||||||||
2012 | 0.02 | 0.02 | 0.024 | 0.02 | 0.11 | 0.017 | 30 | 0.04 | 26 | |||||||||||||
2011 | 0.02 | 0.02 | 0.041 | 0.09 | 0.12 | 0.032 | 31 | 0.04 | 44 | |||||||||||||
2010 | 0.02 | 0.02 | 0.035 | 0.06 | 0.09 | 0.021 | 29 | 0.04 | 38 | |||||||||||||
2009 | 0.02 | 0.02 | 0.036 | 0.08 | 0.13 | 0.027 | 31 | 0.04 | 39 | |||||||||||||
2008 | 0.02 | 0.02 | 0.036 | 0.07 | 0.11 | 0.025 | 31 | 0.04 | 39 | |||||||||||||
2007 | 0.02 | 0.02 | 0.029 | 0.06 | 0.12 | 0.024 | 30 | 0.04 | 32 | |||||||||||||
2006 | 0.02 | 0.02 | 0.045 | 0.09 | 0.18 | 0.041 | 30 | 0.04 | 49 | |||||||||||||
2005 | 0.02 | 0.02 | 0.051 | 0.12 | 0.22 | 0.050 | 31 | 0.04 | 55 | |||||||||||||
2004 | 0.02 | 0.02 | 0.054 | 0.13 | 0.16 | 0.045 | 30 | 0.04 | 59 | |||||||||||||
2003 | 0.02 | 0.06 | 0.078 | 0.18 | 0.22 | 0.063 | 31 | 0.04 | 84 | |||||||||||||
2002 | 0.02 | 0.07 | 0.078 | 0.15 | 0.21 | 0.053 | 30 | 0.04 | 84 | |||||||||||||
2001 | 0.02 | 0.08 | 0.093 | 0.18 | 0.31 | 0.077 | 29 | 0.04 | 101 | |||||||||||||
2000 | 0.02 | 0.06 | 0.096 | 0.22 | 0.38 | 0.099 | 29 | 0.04 | 104 | |||||||||||||
1999 | 0.02 | 0.09 | 0.107 | 0.18 | 0.29 | 0.061 | 30 | 0.04 | 116 | |||||||||||||
1998 | 0.02 | 0.11 | 0.138 | 0.28 | 0.41 | 0.091 | 31 | 0.04 | 149 | |||||||||||||
1997 | 0.02 | 0.10 | 0.121 | 0.22 | 0.50 | 0.109 | 31 | 0.04 | 131 | |||||||||||||
1996 | 0.02 | 0.11 | 0.135 | 0.30 | 0.40 | 0.099 | 30 | 0.04 | 146 | |||||||||||||
1995 | 0.07 | 0.15 | 0.167 | 0.31 | 0.38 | 0.085 | 30 | 0.04 | 181 | |||||||||||||
1994 | 0.02 | 0.15 | 0.194 | 0.36 | 0.64 | 0.146 | 31 | 0.04 | 209 | |||||||||||||
1993 | 0.02 | 0.15 | * | 0.42 | 0.71 | 0.161 | 23 | 0.04 | * | |||||||||||||
1992 | * | * | * | * | * | * | 0 | * | * | |||||||||||||
1991 | * | * | * | * | * | * | 0 | * | * | |||||||||||||
1990 | * | * | * | * | * | * | 0 | * | * | |||||||||||||
1989 | * | * | * | * | * | * | 0 | * | * | |||||||||||||
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. |