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Year | Months Present |
Minimum | Median | Mean | 90th Percentile |
Maximum | Standard Deviation |
Number of Observations |
Detection Limit |
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2024 |
|
0.1 | 0.1 | * | 0.2 | 0.4 | 0.09 | 14 | 0.2 | ||||||||||||
2023 |
|
0.1 | 0.1 | 0.16 | 0.3 | 0.5 | 0.10 | 29 | 0.2 | ||||||||||||
2022 |
|
0.1 | 0.1 | 0.16 | 0.3 | 0.6 | 0.12 | 30 | 0.2 | ||||||||||||
2021 |
|
0.1 | 0.1 | * | 0.2 | 0.7 | 0.13 | 23 | 0.2 | ||||||||||||
2020 |
|
0.1 | * | * | * | 0.5 | 0.16 | 9 | 0.2 | ||||||||||||
2019 |
|
0.1 | 0.1 | 0.22 | 0.5 | 0.8 | 0.19 | 30 | 0.2 | ||||||||||||
2018 |
|
0.1 | 0.2 | 0.29 | 0.4 | 1.7 | 0.33 | 31 | 0.2 | ||||||||||||
2017 |
|
0.1 | 0.2 | 0.33 | 0.7 | 0.8 | 0.25 | 29 | 0.2 | ||||||||||||
2016 |
|
0.1 | 0.2 | 0.28 | 0.6 | 0.9 | 0.20 | 31 | 0.2 | ||||||||||||
2015 |
|
0.1 | 0.3 | 0.38 | 0.9 | 1.1 | 0.29 | 30 | 0.2 | ||||||||||||
2014 |
|
0.1 | 0.2 | 0.36 | 0.8 | 1.4 | 0.33 | 29 | 0.2 | ||||||||||||
2013 |
|
0.1 | 0.4 | 0.45 | 0.8 | 1.2 | 0.29 | 31 | 0.2 | ||||||||||||
2012 |
|
0.1 | 0.3 | 0.40 | 0.9 | 1.8 | 0.43 | 29 | 0.2 | ||||||||||||
2011 |
|
0.1 | 0.4 | 0.49 | 1.0 | 1.8 | 0.46 | 31 | 0.2 | ||||||||||||
2010 |
|
0.1 | 0.4 | 0.58 | 1.5 | 1.7 | 0.49 | 29 | 0.2 | ||||||||||||
2009 |
|
0.1 | 0.3 | 0.57 | 1.3 | 1.7 | 0.47 | 28 | 0.2 | ||||||||||||
2008 |
|
0.1 | 0.4 | 0.47 | 1.0 | 1.6 | 0.36 | 31 | 0.2 | ||||||||||||
2007 |
|
0.1 | 0.4 | 0.66 | 1.5 | 2.8 | 0.68 | 29 | 0.2 | ||||||||||||
2006 |
|
0.1 | 0.5 | 0.77 | 1.8 | 2.5 | 0.62 | 30 | 0.2 | ||||||||||||
2005 |
|
0.1 | 0.5 | 0.68 | 1.5 | 2.5 | 0.56 | 31 | 0.2 | ||||||||||||
2004 |
|
0.2 | 0.8 | 1.02 | 1.9 | 2.3 | 0.60 | 30 | 0.2 | ||||||||||||
2003 |
|
0.3 | 0.8 | 1.27 | 2.5 | 3.4 | 0.90 | 31 | 0.2 | ||||||||||||
2002 |
|
0.4 | 1.5 | * | 2.7 | 3.7 | 0.88 | 16 | 0.2 | ||||||||||||
2001 |
|
0.3 | 0.9 | 1.10 | 1.9 | 3.9 | 0.78 | 30 | 0.2 | ||||||||||||
2000 |
|
0.5 | 0.9 | 1.38 | 2.6 | 4.6 | 1.04 | 27 | 0.2 | ||||||||||||
1999 |
|
0.1 | 1.2 | 1.50 | 3.7 | 4.8 | 1.32 | 24 | 0.2 | ||||||||||||
1998 |
|
0.4 | 1.6 | * | 2.8 | 5.5 | 1.21 | 27 | 0.2 | ||||||||||||
1997 |
|
0.4 | 0.8 | 1.40 | 2.7 | 4.6 | 1.11 | 29 | 0.2 | ||||||||||||
1996 |
|
0.3 | 1.0 | 1.64 | 3.8 | 6.6 | 1.49 | 31 | 0.2 | ||||||||||||
1995 |
|
0.6 | 1.7 | 2.18 | 4.5 | 8.8 | 2.05 | 29 | 0.2 | ||||||||||||
1994 |
|
0.7 | 3.3 | 3.50 | 6.5 | 8.8 | 2.15 | 30 | 0.2 | ||||||||||||
1993 |
|
0.7 | 2.7 | * | 5.6 | 8.0 | 1.98 | 27 | 0.2 | ||||||||||||
1992 |
|
1.1 | 3.0 | 3.39 | 5.4 | 6.4 | 1.49 | 27 | 0.2 | ||||||||||||
1991 |
|
0.9 | 3.5 | 3.69 | 7.0 | 10 | 2.42 | 24 | 0.2 | ||||||||||||
1990 |
|
0.8 | 4.5 | * | 8.4 | 12 | 3.18 | 18 | 0.2 | ||||||||||||
1989 |
|
* | * | * | * | * | * | 0 | * | ||||||||||||
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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. |
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