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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 | 0.03 | * | 0.04 | 0.04 | 0.006 | 15 | 0.02 | * | |||||||||||||
2023 | 0.01 | 0.03 | 0.031 | 0.05 | 0.08 | 0.017 | 30 | 0.02 | 2 | |||||||||||||
2022 | 0.01 | 0.03 | 0.027 | 0.04 | 0.05 | 0.012 | 31 | 0.02 | 2 | |||||||||||||
2021 | 0.01 | 0.02 | * | 0.03 | 0.04 | 0.009 | 23 | 0.02 | * | |||||||||||||
2020 | 0.01 | * | * | * | 0.04 | 0.011 | 7 | 0.02 | * | |||||||||||||
2019 | 0.02 | 0.03 | 0.035 | 0.05 | 0.06 | 0.010 | 30 | 0.02 | 3 | |||||||||||||
2018 | 0.02 | 0.05 | 0.051 | 0.07 | 0.19 | 0.030 | 31 | 0.02 | 4 | |||||||||||||
2017 | 0.02 | 0.04 | 0.045 | 0.06 | 0.07 | 0.012 | 30 | 0.02 | 3 | |||||||||||||
2016 | 0.02 | 0.05 | 0.053 | 0.09 | 0.09 | 0.020 | 31 | 0.02 | 4 | |||||||||||||
2015 | 0.03 | 0.05 | 0.058 | 0.08 | 0.27 | 0.044 | 30 | 0.02 | 4 | |||||||||||||
2014 | 0.02 | 0.04 | 0.041 | 0.07 | 0.08 | 0.017 | 30 | 0.02 | 3 | |||||||||||||
2013 | 0.01 | 0.04 | 0.037 | 0.06 | 0.07 | 0.014 | 31 | 0.02 | 3 | |||||||||||||
2012 | 0.01 | 0.03 | 0.033 | 0.05 | 0.08 | 0.018 | 30 | 0.02 | 2 | |||||||||||||
2011 | 0.02 | 0.03 | 0.036 | 0.05 | 0.07 | 0.012 | 31 | 0.02 | 3 | |||||||||||||
2010 | 0.01 | 0.03 | 0.033 | 0.05 | 0.11 | 0.020 | 29 | 0.02 | 3 | |||||||||||||
2009 | 0.01 | 0.03 | 0.032 | 0.05 | 0.08 | 0.017 | 31 | 0.02 | 2 | |||||||||||||
2008 | 0.01 | 0.03 | 0.031 | 0.05 | 0.07 | 0.015 | 31 | 0.02 | 2 | |||||||||||||
2007 | 0.02 | 0.03 | 0.035 | 0.05 | 0.07 | 0.013 | 30 | 0.02 | 3 | |||||||||||||
2006 | 0.01 | 0.03 | 0.036 | 0.05 | 0.09 | 0.016 | 30 | 0.02 | 3 | |||||||||||||
2005 | 0.01 | 0.03 | 0.038 | 0.07 | 0.08 | 0.017 | 31 | 0.02 | 3 | |||||||||||||
2004 | 0.01 | 0.03 | 0.031 | 0.04 | 0.05 | 0.009 | 30 | 0.02 | 2 | |||||||||||||
2003 | 0.01 | 0.04 | 0.041 | 0.07 | 0.08 | 0.020 | 31 | 0.02 | 3 | |||||||||||||
2002 | 0.01 | 0.03 | 0.031 | 0.04 | 0.06 | 0.011 | 30 | 0.02 | 2 | |||||||||||||
2001 | 0.01 | 0.03 | 0.029 | 0.05 | 0.06 | 0.011 | 29 | 0.02 | 2 | |||||||||||||
2000 | 0.01 | 0.03 | 0.029 | 0.05 | 0.08 | 0.018 | 28 | 0.02 | 2 | |||||||||||||
1999 | 0.01 | 0.03 | * | 0.04 | 0.05 | 0.012 | 21 | 0.02 | * | |||||||||||||
1998 | 0.01 | 0.02 | * | 0.03 | 0.04 | 0.007 | 16 | 0.02 | * | |||||||||||||
1997 | 0.01 | 0.03 | 0.029 | 0.04 | 0.07 | 0.015 | 29 | 0.02 | 2 | |||||||||||||
1996 | 0.01 | 0.03 | 0.033 | 0.04 | 0.11 | 0.020 | 30 | 0.02 | 3 | |||||||||||||
1995 | 0.01 | 0.03 | 0.025 | 0.05 | 0.05 | 0.014 | 30 | 0.02 | 2 | |||||||||||||
1994 | 0.01 | 0.01 | 0.019 | 0.03 | 0.11 | 0.019 | 30 | 0.02 | 1 | |||||||||||||
1993 | 0.01 | 0.02 | * | 0.03 | 0.04 | 0.009 | 23 | 0.02 | * | |||||||||||||
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. |