Table 3.

Number and share of hexagons within study area.

PI value	2016		1978		1934
	Number of hexagons	Share [%]	Number of hexagons	Share [%]	Number of hexagons	Share [%]
3	652	20.34	765	23.87	993	30.98
4	251	7.83	259	8.08	211	6.58
5	254	7.93	297	9.27	252	7.86
6	285	8.89	305	9.52	411	12.82
7	324	10.11	353	11.01	250	7.80
8	415	12.95	355	11.08	337	10.52
9	351	10.95	320	9.98	242	7.55
10	344	10.73	275	8.58	240	7.49
11	257	8.02	180	5.62	172	5.37
12	72	2.25	96	2.99	97	3.03
Total	3205	100	3205	100	3205	100