JanFebMarAprMeiJunJulAugSepOktNovDec
18.1           
27.2           
38.3           
48.2           
57.2           
65.4           
72.7           
81.9           
92.3           
105.8           
115.3           
124.2           
134.3           
141.9           
156.3           
165.9           
173.6           
185.2           
194.8           
202.4           
21            
22            
23            
24            
25            
26            
27            
28            
29           
30           
31       
Gem: * 5.1           
Max: * 8.3           
Min: * 1.9           
Let op:  *dataset is niet compleet.
GemJanFebMarAprMeiJunJulAugSepOktNovDec
2018* 5.1           
20173.66.211.612.119.021.321.721.817.915.79.36.0
20165.07.28.712.319.020.422.522.122.813.18.07.0
20156.26.49.812.815.919.322.323.217.713.211.611.3
20145.99.012.415.716.919.924.821.220.616.310.06.5
20134.03.84.812.816.118.423.323.018.115.19.17.8
2012      * 23.624.018.413.58.96.1
Gem* 5.06.59.513.117.419.9* 23.022.619.314.59.57.4