| http://www.w3.org/ns/prov#value | - It???s not as simple as tides, but it???s not a deep mystery, either. the cycle of solar activity is around 11 years, with a maximum and other peaks, and there???s been an increase in baseline activity of about 1/20th of a percent every decade as far as we can tell, for about 30 years (and maybe more, but we don???t have good estimates on that now).
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