Quarterly report pursuant to Section 13 or 15(d)

Capital

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Capital
3 Months Ended
Mar. 31, 2018
Equity [Abstract]  
Capital
Capital

The Sub-shares and the Certificates of Proprietary Interest are freely interchangeable in the ratio of one Certificate of Proprietary Interest for 3,000 Sub-shares or 3,000 Sub-shares for one Certificate of Proprietary Interest.

Dividends

On March 16, 2018, we paid $31.7 million in dividends representing a cash dividend of $1.05 per Sub-share and a special dividend of $3.00 per Sub-share for sub-shareholders of record at the close of business on March 9, 2018.

On March 16, 2017, we paid $10.7 million in dividends representing a cash dividend of $0.35 per Sub-share and a special dividend of $1.00 per Sub-share for sub-shareholders of record at the close of business on March 9, 2017.

Repurchases of Sub-share Certificates

During the three months ended March 31, 2018, we purchased and retired 13,146 Sub-shares. During the three months ended March 31, 2017, we purchased and retired 29,496 Sub-shares.