Years

Benin

Senegal

Niger

Burkina-Faso

Togo

Average/year

2003

0.9140

0.895

0.671

0.767

1

0.849

2004

0.907

0.845

0.569

0.638

0.993

0.790

2005

0.922

0.851

0.665

0.825

0.993

0.851

2006

0.922

0.839

0.759

0.727

1

0.849

2007

0.974

0.857

0.624

0.713

1

0.834

2008

0.919

0.872

1

0.813

0.962

0.913

2009

0.936

0.869

0.650

0.711

1

0.833

2010

0.932

0.884

0.869

0.750

1

0.887

2011

0.935

0.903

0.672

0.821

0.998

0.866

2012

0.950

0.923

1

0.813

1

0.937

2013

1

0.923

0.730

0.795

0.989

0.887

2014

1

0.958

0.808

0.788

1

0.911

2015

0.988

0.954

0.698

0.788

1

0.886

2016

0.988

0.972

0.732

0.828

1

0.904

2017

1

1

0.726

0.845

1

0.914

Average

0.952

0.903

0.745

0.775

0.995

0.874

Average inefficiency

0.048

0.097

0.255

0.225

0.005

0.126