entergy corporation and subsidiaries notes to financial statements this difference as a regulatory asset or liability on an ongoing basis , resulting in a zero net balance for the regulatory asset at the end of the lease term .the amount was a net regulatory liability of $ 61.6 million and $ 27.8 million as of december 31 , 2013 and 2012 , respectively .as of december 31 , 2013 , system energy had future minimum lease payments ( reflecting an implicit rate of 5.13% ( 5.13 % ) ) , which are recorded as long-term debt , as follows : amount ( in thousands ) .                                             | amount ( in thousands )
2014                                        | $ 51637                
2015                                        | 52253                  
2016                                        | 13750                  
2017                                        | 13750                  
2018                                        | 13750                  
years thereafter                            | 247500                 
total                                       | 392640                 
less : amount representing interest         | 295226                 
present value of net minimum lease payments | $ 97414                 .
Question: what were the future minimum lease payments in 2016?
Steps: Ask for number 52253
Answer: 52253.0
Question: and what were they in 2015?

Read the following texts and table with financial data from an S&P 500 earnings report carefully.Based on the question-answer history (if provided), answer the last question. The answer may require mathematical calculation based on the data provided.
entergy corporation and subsidiaries notes to financial statements this difference as a regulatory asset or liability on an ongoing basis , resulting in a zero net balance for the regulatory asset at the end of the lease term .the amount was a net regulatory liability of $ 61.6 million and $ 27.8 million as of december 31 , 2013 and 2012 , respectively .as of december 31 , 2013 , system energy had future minimum lease payments ( reflecting an implicit rate of 5.13% ( 5.13 % ) ) , which are recorded as long-term debt , as follows : amount ( in thousands ) .                                             | amount ( in thousands )
2014                                        | $ 51637                
2015                                        | 52253                  
2016                                        | 13750                  
2017                                        | 13750                  
2018                                        | 13750                  
years thereafter                            | 247500                 
total                                       | 392640                 
less : amount representing interest         | 295226                 
present value of net minimum lease payments | $ 97414                 .
Question: what were the future minimum lease payments in 2016?
Steps: Ask for number 52253
Answer: 52253.0
Question: and what were they in 2015?
