Note 14. Revenues

Rents for 2014, 2013 and 2012, respectively, are comprised of the following:


	Years ended December 31,
	2014	2013	2012
Base rents	$ 110,739,000	$ 103,721,000	$ 96,897,000
Percentage rent	683,000	804,000	1,001,000
Straight-line rents	761,000	1,387,000	930,000
Amortization of intangible lease liabilities	4,322,000	4,441,000	5,359,000
Total rents	$ 116,505,000	$ 110,353,000	$ 104,187,000

Annual future base rents due to be received under non-cancelable operating leases in effect at December 31, 2014 are approximately as follows (excluding those base rents applicable to properties treated as discontinued operations):


2015		$ 106,034,000
2016		96,504,000
2017		85,264,000
2018		76,439,000
2019		63,524,000
Thereafter		301,207,000
		$ 728,972,000

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 $32.1 million, $29.5 million and $26.5 million for 2014, 2013 and 2012, respectively. Such amounts do not include amortization of intangible lease liabilities.

Other

Other revenues include items which, although recurring, tend to fluctuate more than rental income from period to period, such as lease termination income. Other revenues in 2012 include lease termination income (approximately $3.0 million) and fees earned from the Cedar/RioCan joint venture in 2012 (approximately $2.8 million). 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”).