The graph below shows the average number of sunspots seen between 1610 and 2009.

Based on the graph, which of these conclusions is most likely correct?

The global climate was colder than normal from 1650 to 1700.
The global climate was colder than normal from 1950 to 2000.
The global climate was hotter than normal from 1630 to 1650.
The global climate was hotter than normal from 1900 to 1930.