Also available in PDF.

Also available in PDF.

Data source: For 1976/01/05 to 2011/02/02 Physikalisch Meteorologisches Observatorium Davos, World Radiation Center and for 2011/02/03 to 2013/05/22 University of Colorado Solar Radiation & Climate Experiment. Data are matched using the 2010/02/03 to 2011/02/02 period. (Last modified: 2013/05/29)

[Note on http://lasp.colorado.edu/sorce/data/data_product_summary.htm: Updates to the SORCE data record are currently not being produced while the SORCE spacecraft recovers from a battery anomaly. Updates will recommence when the instruments are acquiring science data again and data processing changes are implemented to accomodate more limited observing modes.]

Long-Term Sunspot Numbers

Also available in PDF. Data source: SIDC - Solar Influences Data Analysis Center (Data are through April 2013, Last modified: 2013/05/01)