Table 4.

Parameters of network analysis, 1990–2018

Year	Density	Degree centrality	Eigenvector centrality	Betweenness centrality	Closeness centrality	Clustering coefficient
1990	0.679	0.662	0.269	0.029	0.788	0.843
1991	0.679	0.679	0.269	0.029	0.788	0.843
1992	0.758	0.811	0.275	0.024	0.846	0.898
1993	0.846	0.980	0.274	0.014	0.886	0.897
1994	0.859	0.859	0.274	0.013	0.895	0.902
1995	0.795	0.795	0.273	0.019	0.855	0.874
1996	0.859	0.859	0.274	0.013	0.895	0.902
1997	0.923	0.978	0.276	0.007	0.938	0.937
1998	0.910	0.910	0.276	0.008	0.929	0.931
1999	0.872	0.872	0.275	0.012	0.904	0.907
2000	0.962	0.962	0.277	0.003	0.967	0.965
2001	0.857	0.917	0.277	1.551	0.925	0.976
2002	0.987	0.987	0.277	0.001	0.988	0.987
2003	0.987	0.987	0.277	0.001	0.988	0.987
2004	0.987	0.987	0.277	0.001	0.988	0.987
2005	0.962	0.962	0.277	0.003	0.967	0.965
2006	0.987	0.987	0.277	0.001	0.988	0.987
2007	0.987	0.987	0.277	0.001	0.988	0.987
2008	0.987	0.987	0.277	0.001	0.988	0.987
2009	0.987	0.987	0.277	0.001	0.988	0.987
2010	0.868	0.929	0.277	0.012	0.934	0.988
2011	0.868	0.929	0.277	0.012	0.934	0.988
2012	0.868	0.929	0.277	0.012	0.934	0.988
2013	0.868	0.929	0.277	0.012	0.934	0.988
2014	0.879	0.941	0.277	0.012	0.934	0.988
2015	0.879	0.941	0.277	0.012	0.934	0.988
2016	0.868	0.929	0.277	0.012	0.934	0.988
2017	0.857	0.917	0.277	0.013	0.925	0.976
2018	0.846	0.905	0.277	0.008	0.907	0.985

Source: Author’s own calculations