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| | | | | | | | | | | | | | | | Period | Number of PS contracts | | 12/31/2013 | 27,824 | | 9/30/2013 | 27,818 | | 6/30/2013 | 27,814 | | 3/31/2013 | 27,711 | | 12/31/2012 | 28,629 | | 9/30/2012 | 23,620 | | 6/30/2012 | 22,457 | | 3/31/2012 | 20,885 | | 12/31/2011 | 18,644 | | 9/30/2011 | 15,919 | | 6/30/2011 | 14,123 | | 3/31/2011 | 12,027 | | 12/31/2010 | 9,811 | | 9/30/2010 | 5,690 | | 6/30/2010 | 3,560 |
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| Report updated 28 Oct 2026 |
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