Note 15. Revenues

Rents for 2012, 2011 and 2010, respectively, are comprised of the following:


	Years ended December 31,
	2012	2011	2010
Base rents	$ 100,836,000	$ 97,015,000	$ 93,074,000
Percentage rent	1,074,000	1,058,000	906,000
Straight-line rents	986,000	1,199,000	1,550,000
Amortization of intangible lease liabilities	5,364,000	5,736,000	6,094,000
Total rents	$ 108,260,000	$ 105,008,000	$ 101,624,000

Other revenues include lease termination income (approximately $3.0 million) in 2012 and fees earned from the Cedar/RioCan joint venture. The management agreement relating to the Cedar/RioCan joint venture properties terminated on January 31, 2013 (see Note 5 –“Investment in Cedar/RioCan Joint Venture”).

Annual future base rents due to be received under non-cancelable operating leases in effect at December 31, 2012 are approximately as follows (excluding those base rents applicable to properties treated as discontinued operations):


2013		$ 103,253,000
2014		94,053,000
2015		82,900,000
2016		71,206,000
2017		59,621,000
Thereafter		304,714,000
		$ 715,747,000

Total future minimum rents do not include expense recoveries for real estate taxes and operating costs, or percentage rents based upon tenants’ sales volume. Such additional revenue amounts aggregated approximately $27.4 million, $27.9 million and $26.5 million for 2012, 2011 and 2010, respectively. Such amounts do not include amortization of intangible lease liabilities.