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.

Text: part i item 1 . business our company founded in 1886 , american water works company , inc. , ( the 201ccompany , 201d 201camerican water 201d or 201caww 201d ) is a delaware holding company . american water is the most geographically diversified , as well as the largest publicly-traded , united states water and wastewater utility company , as measured by both operating revenues and population served . as a holding company , we conduct substantially all of our business operations through our subsidiaries . our approximately 6400 employees provide an estimated 15 million people with drinking water , wastewater and/or other water-related services in 47 states and one canadian province . operating segments we report our results of operations in two operating segments : the regulated businesses and the market- based operations . additional information with respect to our operating segment results is included in the section entitled 201citem 7 2014management 2019s discussion and analysis of financial condition and results of operations , 201d and note 18 of the consolidated financial statements . regulated businesses our primary business involves the ownership of subsidiaries that provide water and wastewater utility services to residential , commercial , industrial and other customers , including sale for resale and public authority customers . we report the results of this business in our regulated businesses segment . our subsidiaries that provide these services are generally subject to economic regulation by certain state commissions or other entities engaged in economic regulation , hereafter referred to as public utility commissions , or 201cpucs , 201d of the states in which we operate . the federal and state governments also regulate environmental , health and safety , and water quality matters . our regulated businesses segment operating revenues were $ 2674.3 million for 2014 , $ 2539.9 for 2013 , $ 2564.4 million for 2012 , accounting for 88.8% ( 88.8 % ) , 90.1% ( 90.1 % ) and 89.9% ( 89.9 % ) , respectively , of total operating revenues for the same periods . the following table sets forth our regulated businesses operating revenues , number of customers and an estimate of population served as of december 31 , 2014 : operating revenues ( in millions ) % (  % ) of total number of customers % (  % ) of total estimated population served ( in millions ) % (  % ) of total . <table class='wikitable'><tr><td>1</td><td>new jersey</td><td>operatingrevenues ( in millions ) $ 652.3</td><td>% (  % ) of total 24.5% ( 24.5 % )</td><td>number ofcustomers 648066</td><td>% (  % ) of total 20.2% ( 20.2 % )</td><td>estimatedpopulationserved ( in millions ) 2.7</td><td>% (  % ) of total 22.7% ( 22.7 % )</td></tr><tr><td>2</td><td>pennsylvania</td><td>605.4</td><td>22.6% ( 22.6 % )</td><td>666415</td><td>20.7% ( 20.7 % )</td><td>2.2</td><td>18.5% ( 18.5 % )</td></tr><tr><td>3</td><td>missouri</td><td>270.2</td><td>10.1% ( 10.1 % )</td><td>464498</td><td>14.4% ( 14.4 % )</td><td>1.5</td><td>12.7% ( 12.7 % )</td></tr><tr><td>4</td><td>illinois ( a )</td><td>262.3</td><td>9.8% ( 9.8 % )</td><td>312017</td><td>9.7% ( 9.7 % )</td><td>1.3</td><td>10.9% ( 10.9 % )</td></tr><tr><td>5</td><td>california</td><td>209.8</td><td>7.8% ( 7.8 % )</td><td>174198</td><td>5.4% ( 5.4 % )</td><td>0.6</td><td>5.0% ( 5.0 % )</td></tr><tr><td>6</td><td>indiana</td><td>200.6</td><td>7.5% ( 7.5 % )</td><td>293666</td><td>9.1% ( 9.1 % )</td><td>1.2</td><td>10.1% ( 10.1 % )</td></tr><tr><td>7</td><td>west virginia ( b )</td><td>127.0</td><td>4.7% ( 4.7 % )</td><td>170371</td><td>5.3% ( 5.3 % )</td><td>0.6</td><td>5.0% ( 5.0 % )</td></tr><tr><td>8</td><td>subtotal ( top seven states )</td><td>2327.6</td><td>87.0% ( 87.0 % )</td><td>2729231</td><td>84.8% ( 84.8 % )</td><td>10.1</td><td>84.9% ( 84.9 % )</td></tr><tr><td>9</td><td>other ( c )</td><td>346.7</td><td>13.0% ( 13.0 % )</td><td>489961</td><td>15.2% ( 15.2 % )</td><td>1.8</td><td>15.1% ( 15.1 % )</td></tr><tr><td>10</td><td>total regulated businesses</td><td>$ 2674.3</td><td>100.0% ( 100.0 % )</td><td>3219192</td><td>100.0% ( 100.0 % )</td><td>11.9</td><td>100.0% ( 100.0 % )</td></tr></table> ( a ) includes illinois-american water company , which we refer to as ilawc and american lake water company , also a regulated subsidiary in illinois. .
Question: as of december 31, 2014, what was the total estimated population served?
Answer: 11900000.0
Question: and how much was the total number of customers as a percentage of this total amount?

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