Old World origins

One of the things I really love to do is find ways to visualize data.  I do this for mundane things in my everyday life, and this compulsion has carried over to my work in genealogy.  Recently I decided to make a table of my ancestral origins.  This is the result:

Country	Region	City	Surname(s)	Immigrant(s)	Date	%
Italy	Calabria	Gioiosa Ionica	Loccisano, Sfara	Vincent Loccisano	1939	25.0%
Italy	Calabria	Cardinale	De Fazio, Rotiroti	Elizabeth De Fazio	1926	25.0%
Germany	Hesse	Angersbach	Miller/Möller, Eifert	Conrad Miller & Maria Eifert	1882-1887	12.5%
Germany	Prussia, Posen	Pogorzela	Pritz, Zuelke	Louis Pritz	1892	12.5%
United States	NJ/PA	Phillipsburg/ Easton	Sauder, Barnett			5.5%
United States	PA	North Whitehall	Mertz, Boyer, Klotz			4.7%
United States	PA	Lynn	Schmidt, unk.			3.5%
Germany	Württemberg		Gerard	Catherine Gerard	1816	3.1%
Germany	Palatinate	Dielkirchen	Benner, Stoller	Valentine Benner	1856	3.1%
Germany	Württemberg		Stehley/Stähle	Jacob Stehley	1814	1.6%
Germany			Moyer/Meyer	Wilhelm Meyer	1740-1760	1.2%
Germany			Trittenbach/ Drittenbach	Johann Michael Drittenbach	1749	0.8%
United States	PA	Heidelberg	Delong			0.8%
Germany	Alsace	Oberbetchdorf	Kressley/ Grässel	Jacob Grässel	1754	0.4%
Germany	Palatinate		Neff	Anna Neff	1730-1760	0.4%

My goal here was to account for every immigration event in my family tree, and to determine the percentage of my ancestry tied to each event.  Of course I couldn't pin down every immigrant, so I simply listed the U.S. region of the relevant family branch.

So I am 50% Italian.  I've traced about 35% of my ancestors to Germany, or at least to areas that were culturally German, via nine separate immigration events, which I think is amazing.  The remaining 15% of my heritage is unaccounted for, but based on last names and locations in eastern Pa., I suspect it is mostly German as well.