Five -Year Financial Highlights

Three Months Ended
March 31,
Years Ended December 31,
  2018   2017   2017   2016   2015   2014

(billions — except per share amounts)

                       
Net premiums written $ 8.0 $ 6.5 $ 27.1 $ 23.4 $ 20.6 $ 18.7
Growth over prior period   23%   12%   16%   14%   10%   8%
Net premiums earned $ 7.2 $ 6.0 $ 25.7 $ 22.5 $ 19.9 $ 18.4
Growth over prior period   19%   13%   14%   13%   8%   8%
Total revenues $ 7.4 $ 6.3 $ 26.8 $ 23.4 $ 20.9 $ 19.4
Net income attributable to Progressive $ 0.72 $ 0.42 $ 1.59 $ 1.03 $ 1.27 $ 1.28
Per common share $ 1.22 $ 0.73 $ 2.72 $ 1.76 $ 2.15 $ 2.15
Underwriting margin   11.6%   8.3%   6.6%   4.9%   7.5%   7.7%
                     
At Period-End

(billions — except shares outstanding, per share amounts, and policies in force)

                       
Common shares outstanding (millions)   582.4   580.9   581.7   579.9   583.6   587.8
Book value per common share $ 16.88 $ 14.67 $ 15.96 $ 13.72 $ 12.49 $ 11.79
Consolidated shareholders’ equity $ 10.3 $ 8.5 $ 9.3 $ 8.0 $ 7.3 $ 6.9
Market capitalization $ 35.5 $ 22.8 $ 32.8 $ 20.6 $ 18.6 $ 15.9
Return on average common shareholders’ equity                    
Net income attributable to Progressive   20.3%   14.9%   17.8%   13.2%   17.2%   19.1%
Comprehensive income attributable to Progressive   21.0%   17.4%   21.7%   14.9%   14.2%   20.1%
                     
Policies in force (thousands)                    
Vehicle businesses:                    
Personal Lines                    
Agency — auto   5,909.1   5,228.3   5,670.7   5,045.4   4,737.1   4,725.5
Direct — auto   6,385.6   5,570.7   6,039.1   5,348.3   4,916.2   4,505.5
Special lines   4,286.2   4,255.4   4,365.7   4,263.1   4,111.4   4,030.9
Total Personal Lines   16,580.9   15,054.4   16,075.5   14,656.8   13,764.7   13,261.9
Growth over prior year   10%   6%   10%   6%   4%   2%
Commercial Lines   659.0   607.5   646.8   607.9   555.8   514.7
Growth over prior year   8%   6%   6%   9%   8%   0%
Property   1,651.0   1,265.3   1,461.7   1,201.9   1,076.5   |||||||
Growth over prior year   30%   17%   22%   12%   NM   |||||||
                         
Private passenger auto insurance market1 NA NA   NA $ 206.6 $ 192.8 $ 183.5
Market share2   NA   NA   NA   9.4%   9.0%   8.9%
                     
Stock Price Appreciation3                        
Progressive   10.3%   12.3%   61.6%   14.7%   20.9%   5.3%
S&P 500   (0.8)%   6.1%   21.9%   11.9%   1.4%   13.7%

NM = Not meaningful; Property business written by Progressive prior to April 2015 was negligible.

NA = Not available; Final comparable industry data for year-end 2017 will not be available until our third quarter report.

1Represents net premiums written as reported by A.M. Best Company, Inc.

2Represents Progressive’s private passenger auto business, including motorcycle insurance, as a percent of the private passenger auto insurance market.

3Represents average annual compounded rate of increase and assumes dividend reinvestment.