Figure 3
A line graph displays the posterior mean coefficients for AfT sent and AfT received from 2004 to 2021. The horizontal axis represents the year, ranging from 2004 to 2021. The vertical axis represents the posterior mean coefficient, ranging from 0.0 to 0.4. The blue solid line represents AfT sent, and the red dashed line represents AfT received. Both lines have corresponding 95% credible interval ribbons. The AfT sent line shows fluctuations with a general downward trend, while the AfT received line also fluctuates but with a more pronounced decline over the years. The credible intervals for both lines exclude zero in every estimation year.AME posterior means for AfT dyad coefficients, 2004–2021. Blue solid line and ribbon = AfT sent (mean and 95% CI); red dashed line and ribbon = AfT received (mean and 95% CI). All credible intervals exclude zero in every estimation year