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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 | * | 0.06 | 0.11 | 0.027 | 20 | 0.04 | * | |||||||||||||
2022 | 0.02 | 0.02 | 0.041 | 0.12 | 0.14 | 0.040 | 30 | 0.04 | 44 | |||||||||||||
2021 | 0.02 | 0.02 | * | 0.06 | 0.17 | 0.033 | 22 | 0.04 | * | |||||||||||||
2020 | 0.02 | * | * | * | 0.12 | 0.033 | 9 | 0.04 | * | |||||||||||||
2019 | 0.02 | 0.02 | 0.043 | 0.12 | 0.21 | 0.049 | 30 | 0.04 | 46 | |||||||||||||
2018 | 0.02 | 0.02 | 0.058 | 0.10 | 0.38 | 0.073 | 30 | 0.04 | 62 | |||||||||||||
2017 | 0.02 | 0.02 | 0.064 | 0.13 | 0.31 | 0.075 | 28 | 0.04 | 69 | |||||||||||||
2016 | 0.02 | 0.02 | 0.051 | 0.09 | 0.22 | 0.045 | 31 | 0.04 | 55 | |||||||||||||
2015 | 0.02 | 0.02 | 0.072 | 0.16 | 0.33 | 0.076 | 30 | 0.04 | 78 | |||||||||||||
2014 | 0.02 | 0.02 | 0.062 | 0.15 | 0.24 | 0.064 | 29 | 0.04 | 67 | |||||||||||||
2013 | 0.02 | 0.04 | 0.085 | 0.25 | 0.38 | 0.099 | 31 | 0.04 | 92 | |||||||||||||
2012 | 0.02 | 0.02 | 0.048 | 0.14 | 0.25 | 0.062 | 29 | 0.04 | 52 | |||||||||||||
2011 | 0.02 | 0.04 | 0.081 | 0.22 | 0.39 | 0.094 | 32 | 0.04 | 88 | |||||||||||||
2010 | 0.02 | 0.04 | 0.068 | 0.19 | 0.24 | 0.068 | 30 | 0.04 | 74 | |||||||||||||
2009 | 0.02 | 0.04 | 0.080 | 0.17 | 0.37 | 0.081 | 31 | 0.04 | 86 | |||||||||||||
2008 | 0.02 | 0.02 | 0.069 | 0.18 | 0.26 | 0.074 | 31 | 0.04 | 74 | |||||||||||||
2007 | 0.02 | 0.05 | 0.081 | 0.29 | 0.34 | 0.097 | 30 | 0.04 | 88 | |||||||||||||
2006 | 0.02 | 0.05 | 0.091 | 0.25 | 0.44 | 0.102 | 30 | 0.04 | 98 | |||||||||||||
2005 | 0.02 | 0.05 | 0.104 | 0.31 | 0.45 | 0.123 | 31 | 0.04 | 113 | |||||||||||||
2004 | 0.02 | 0.06 | 0.137 | 0.36 | 0.58 | 0.157 | 30 | 0.04 | 148 | |||||||||||||
2003 | 0.02 | 0.08 | 0.131 | 0.36 | 0.52 | 0.138 | 31 | 0.04 | 142 | |||||||||||||
2002 | 0.06 | * | * | * | 0.38 | 0.124 | 6 | 0.04 | * | |||||||||||||
2001 | * | * | * | * | * | * | 0 | * | * | |||||||||||||
2000 | * | * | * | * | * | * | 0 | * | * | |||||||||||||
1999 | * | * | * | * | * | * | 0 | * | * | |||||||||||||
1998 | * | * | * | * | * | * | 0 | * | * | |||||||||||||
1997 | * | * | * | * | * | * | 0 | * | * | |||||||||||||
1996 | * | * | * | * | * | * | 0 | * | * | |||||||||||||
1995 | * | * | * | * | * | * | 0 | * | * | |||||||||||||
1994 | * | * | * | * | * | * | 0 | * | * | |||||||||||||
1993 | * | * | * | * | * | * | 0 | * | * | |||||||||||||
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. |