Highcharts - the third line is not displayed properly (jsfiddle included)

Highcharts - the third line is not displayed properly (jsfiddle included)

I have a Highcharts graph that consist of 3 lines - [fiddle here][1]. The
problem is, that the third line (the black one - New York) is not
displayed properly - the points with 0 value are not shown into the graph.
But the zero-points for those 2 previous lines are displayed properly.
Am I missing something or why is the third line incomplete?
Thanks
[1]: http://jsfiddle.net/hHJvq/