Am I exaggerrating? Maybe. By much? Maybe not! Take a look:
17.12.1917-09.03.1918 Acting Head of the Government Evheniya Bohdanivna Bosch, Ukraine. 06.04.1940-11.10.1944 Head of State Khertek Anchimaa-Toka, People's Republic of Tannu Tuva. 21.07.1960-27.03.1965, 29.05.1970-23.07.1977, 14.11.1994-10.8.2000 Prime Minister Sirimavo Ratwatte Dias Bandaranaike, Sri Lanka. 19.01.1966-24.03.1977, 14.01.1980-31.10.1984 (†), Prime Minister Indira Gandhi, India. 31.10.1968-24.02.1972 Acting Head of State Song Qingling, China. 17.03.1969-10.04.1974 Minister President Golda Meïr, Israel. 01.07.1974- 24.03.1976 Executive President Maria Estella Martínez de Perón, Argentina. 03.01.1975-07.04.1976 Premierministre Élisabeth Domitién, Central African Republic. 08-1977-09.1977 Minister President Lucinda E. da Costa Gomez-Matheeuws, The Netherlands Antilles. 03.05.1979-22.11.1990 Prime Minister Margaret Thatcher, United Kingdom of Great Britain. 01.08.1979-3.01.1980 President of the Council of Ministers Dr. Maria de Lourdes Ruivo da Silva Pintasilgo, Portugal. 17.11.1979-18.07.1980 Interim Executive President Lidia Gueiler Tejada, Bolivia. 21.07.1980-14.06.1995 Prime Minister Dame M. Eugenia Charles, Dominica. 01.08.1980-01.08.1996 President Vigdís Finnbogadóttir, Iceland. 04.02.1981-14.10.1981, 09.05.1986-16.10.1989, 30.11.1990-25.10.1996, Minister of State Gro Harlem Brundtland, Norway. 01.04.1981-01.10.1981 Captain Regent Maria Lea Pedini Angelini, San Marino. 21.09.1981-17.011.1993 Governor General Dame Elmira Minita Gordon, Belize. 15.02.1982-15.02.1987 President Agatha Barbara, Malta. 24.03.1982-25.03.1985 President of the Government Lucette Michaux-Chevry, Guadalupe. 15.05.1982-15.05.1986 Chairperson of the Council of Ministers Milka Planinc, Yugoslavia. 01.04.1984-01.10.1984 Captain Regent Gloriana Ranocchini, San Marino. 14.05.1984-29.01.1990 Governor General The Rt. Hon. Jeanne Sauvé, Canada. 14.05-16.05.1984 Acting Head of State Carmen Pereira, Guinea Bissau. 18.09.1984-01.01.1986, 17.051988-25.12.1993 Minister President Maria Ph. Liberia-Peters, Nederlandse Antillen. 25.2.1986-30.06.1992 Executive President Maria Corazon Sumulong Cojuangco Aquino, The Philippines. 05.10.1987-30.12.1987 Prime Minister Princess Stella Margaret Nomzamo Sigcau, Transkei. 02.12.1988-06.08.1990, 19.10.1993-05.11.1996 Prime Minister Benazir Bhutto, Pakistan. 13.03.1990-07.02.1991 Acting President Ertha Pascal-Trouillot, Haiti. 17.03.1990-10.01.1991 Minister President Kasimiera Prunskienė, Lithuania. 05.04.1990-02.10.1990 Acting Head of State Dr. Sabine Bergmann-Pohl, East-Germany. 25.04.1990-10.01.1997 Executive President Violeta Barrios de Chamorro, Nicaragua. 20.11.1990-21.03.1996 Governor General Dame Catherine Tizard, New Zealand. 03.12.1990-12.09.1997 President Mary Robinson, Ireland. 20.03.1991-30.03.1996, 01.09.2001-29.10.2006 Prime Minister Begum Khaleda Zia, Bangladesh. 01.10.1991-01.04.1992 Captain Regent Edda Ceccoli, San Marino. 15.05.1991-02.04.1992 Premier Ministre Edith Cresson, France. 08.07.1992-26.10.1993 Minister President Hanna Suchocka, Poland. 25.01.1993-15.09.1994 Premier Marita Petersen, The Faeroe Islands. 01.04.1993-01.10.1993 Captain Regent Patrizia Busignani, San Marino. 25.06.1993-07.03.1996 Minister President Tansu Çiller, Turkey. 25.06.1993-04.11.1993 Prime Minister A. Kim Campbell, Canada. 10.07.1993-11.02.1994 Premier Ministre Sylvie Kinigi, Burundi. 18.07.1993-07.05.1994 (†) Premier Ministre Agathe Uwilingiymana, Rwanda. 25.12.1993-28.12.1993 Minister President Suzanne Camelia-Römer, Nederlandse Antillen. 19.8.1994-14.11.1994 Prime Minister Chandrika Bandaranaike Kumaratunga, Sri Lanka, 14.11.1994-19.11.2005 Executive President. 16.10.1994-25.01.1995 Interim Minister President Reneta Ivanova Indzhova, Bulgaria. 06.06.1990-19.12.1995 (†) Governor General Dame Nita Barrow, Barbados. 07.11.1995-27.02.1996 Premier Minister Claudette Werleigh, Haïti. 23.06.1996-15.7.2001, 06.01.2009- Prime Minister Sheikh Hasina Wajed, Bangladesh. 19.07.1996-04.11.1998 President Biljana Plavsic, Republic of Srpska. 03.09.1996-02.08.1997 Chairperson of the Council of State Ruth Sando Perry, Liberia. 09.02.1997-11.02.1997 Acting Executive President Rosalia Arteaga Serrano de Fernández de Córdova, Ecuador. 17.03.1997-22.12.1997 Prime Minister Janet Jagan, Guyana, 19.12.1997-11.08.99 Executive President. 17.09.1997- Governor General Dame C. Pearlette Louisy, St. Lucia. 11.11.1997-11.11.2011 President Mary McAleese, Ireland. 08.12.1997-10.12.1999 Prime Minister Jenny Shipley, New Zealand.
Aaaarggghh! I'm sorry, ladies, I really am, but we're only up to 1997 and I have other things to do. 6 women assumed office as head of state in 1997, 10 did so in 2105, 5 have so far in 2016.
That makes a total of... Let's see... 1, 2 3... every country on Earth except the US and the Vatican.
So it's not just congratulations to Hillary, it's congratulations and about freakin' time! Let's join the human race, America!